The 1999 Mercedes E320 AC compressor may not be working due to a faulty compressor, low refrigerant levels, a malfunctioning pressure switch, or electrical issues. It is recommended to have a qualified technician diagnose the problem to determine the exact cause and provide the necessary repairs.

Are you the proud owner of a 1999 Mercedes E320, a car that exudes elegance and sophistication? As an enthusiast, you take pride in maintaining your vehicle’s peak performance, but what happens when your AC compressor stops working? It can be frustrating and uncomfortable, especially during those scorching summer months. Fear not, for this blog article is here to help you troubleshoot and resolve this issue.

Whether you are a seasoned mechanic or a DIY enthusiast, this guide is tailored to your needs. We understand that you possess a moderate to advanced knowledge of car mechanics and have likely worked on your own vehicle before.

Now, let’s delve into the heart of the matter – a malfunctioning AC compressor in your treasured 1999 Mercedes E320. Why is your AC compressor not working? There could be various factors at play, such as wear and tear, electrical issues, or refrigerant leaks. This article will explore these possibilities and provide you with step-by-step instructions on how to diagnose and resolve the problem.

But that’s not all. In addition to troubleshooting tips, we will also share valuable insights on preventive maintenance and care to ensure your AC compressor remains in optimal condition. So, if you’re tired of sweating through your drives and want to regain the cool comfort of your Mercedes E320’s AC system, keep reading.

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Bestseller No. 1

AC Compressor & A/C Kit For Mercedes E320 E300D E420 E430 & E55 AMG W210 1996 1997 1998 1999 2000 2001 2002 – BuyAutoParts 60-80148RK New

Engineered for superior durability, backed by industry-leading 2-year, unlimited-mileage warranty
Guaranteed Exact Fit for easy installation
100% BRAND NEW, premium ISO/TS 16949 quality – no core deposit or return required!
Kit includes compressor with clutch, drier filter, expansion valve, oil and O-ring seals. Please note: for use only in motor vehicle air conditioner (MVAC) systems. Use in a 20-ounce self-sealing container.
Fits all US-spec 1996-2002 Mercedes E-Class, chassis code W210

Bestseller No. 2

ECCPP A/C Compressor 1997-2008 Fit for Mercedes Benz C220 C230 Series for Dodge Sprinter 2500 3500 A/C Compressor with Clutch

LOW NOISE A/C COMPRESSOR FITMENT: 2004-2008 Fit for Chrysler Crossfire 3.2L,2003-2006 Fit for Dodge Sprinter 2500 2.7L,2003-2006 Fit for Dodge Sprinter 3500 2.7L,2002-2004 Fit for Freightliner Argosy –,2000-2003 Fit for Freightliner Argosy 10.3L,1999-2003 Fit for Freightliner Argosy 10.8L,1999-2003 Fit for Freightliner Argosy 11.1L,1999-2004 Fit for Freightliner Argosy 12.0L,1999-2004 Fit for Freightliner Argosy 12.7L,1999-2004 Fit for Freightliner Argosy 14.0L,1999-2004 Fit for Freightliner Argosy 14.6L
STRONG COOLING AIR CONDITIONING COMPRESSORS PART NUMBER: 1520971,DW77356,10343180,10347421,10105111,12105111,5097010AA,639307,CS20084,4710293,4711293,11105111,77356,78356,2041697,5511631,5512187,6511631,6512187,7511631,7512187,295067NA,5839,5844,0002302011,254442. Oil Type: PAG46, Pulley Grooves:6, Pulley Diameter (mm): 119, Compressor type: SD7SB16C, Internal Oil Content 130ml; Refrigerant Type: R-134A
ENERGY SAVING AIR CONDITIONER COMPRESSOR FUNCTION: AC compressor pump are the heart of automotive air conditioning refrigeration systems and with a heavy responsibility to compress and transport refrigerant vapors throughout of the automobile’s A/C system
BEST FEATURE: air conditioner compressors are designed and manufactured to meet or exceed the standards of the original equipment components we are replacing. Each compressor is loaded with lubricating oil to prevent rust of compressors’ internal parts, oxidization, and ensure proper lubrication (please ask professional mechanics to measure appropriate oil requirements for your specific A/C system)
INCLUDED: AC compressor and clutch. All compressors are pressure tested with nitrogen for leaks to ensure their quality. The internal parts are lubricated during production and this item is pre-filled with oil upon delivery; therefore, there is no need to add oil during initial use. Excessive oil addition may damage the ac compressor

Bestseller No. 3

A-Premium Air Conditioner AC Compressor with Clutch Compatible with Mercedes-Benz C-Class C230 C320, CLK-Class CLK320 CLK350, E-Class E300 E350, G-Class G500 G550, S-Class & More

[Specifications]: ①Compressor Type: 7SEU17/7SEU16C/6SEU16C; ②Oil Type: PAG46; ③R-efrigerant Type: R-134A; ④Pulley Grooves: 6; ⑤Clutch Included: Yes; ⑥Oil Prefilled: 100 ml (10 ml tolerance)
[Vehicle Fitment]: Compatible with Mercedes-Benz C-Class, C230, C240, C250, C280, C300, C320, C350, C63 AMG; CL-Class, CL500, CL600, CL55/CL65 AMG; CLK-Class, CLK320, CLK350, CLK430; CLS-Class, CLS500, CLS55/CLS63 AMG; E-Class, E300, E320, E350, E430, E500, E55/E63 AMG; G-Class; GLK-Class; ML-Class; R-Class, R63 AMG; S-Class; SL-Class; SLK-Class
[Part Number]: 00023-06511, 00023-08011, 00023-08111, 00023-08511, 00023-08811, 00023-09011, CO-11245C, 98394, 97394
[OE Replacement]: 100% brand new automotive AC Compressor and A/C Clutch kit. Please make sure to match photos with your existing a/c compressor. Confirm that this AC Compressor for car will fit your car by using Amazon’s garage
[Buy with Confidence]: A-Premium offers a one-year unlimited-mileage guarantee on our meticulously crafted Air Conditioning Compressor for car. We offer a wide variety of automotive accessory categories, ensuring that you can hit the road with peace of mind

Bestseller No. 4

KAX 77356 AC Compressor for E320 1996-2003,ML320 1998-2002,Sprinter 2500 2003-2006,SLK230 1998-2001,Crossfire 2005-2006 3.2L,CLK320 1998-2002, 1520971 Air Conditioning Compressor

Wide Compatibility – AC Compressor Clutch Kit Replacement for Mercedes-Benz E320 1996-2003, ML320 1998-2002, SLK230 CLK320 1998-2001, Acu-ra RL 1997-2002, Sprinter 2500 2002-2006. Replace 10349930, 1011218.
Strict Testing Before Delivery – All Air conditioning compressor clutch parts undergo various rigorous tests before delivery to ensure that you receive high-performance, reliable auto parts. Strict professional testing includes aging test, durability test, hardness test, etc. Air Conditioning Compressor OE Number: 1520971,DW77356,10343180,10347421,10105111,12105111,5097010AA,639307,CS20084,4710293,4711293,11105111,77356,78356,2041697,5511631,5512187,6511631,6512187,7511631,7512187
Premium Quality- This Air conditioning compressor clutch is made of high-quality material and maintains an excellent strength to give the parts long-term performance. Compatible Refrigerant Oil Type:PAG 46, Pulley Groove Quantity: 6, Pulley Diameter:4.75, Refrigerant Type: R134a
EASY INSTALLATION – Plug and play design, no modification or drilling, quick installation. Shock, abrasion and fatigue tested to help ensure quality and durability.
Reminder:Please carefully select your vehicle info (year/make/model/trim ) in the top left corner of the page to confirm compatibility. Or refer to the vehicles and product specification information in description. If you have any questions or concerns, we are here to help.

Bestseller No. 5

New AC Air Condition Compressor with Clutch for Mercedes-Benz B200 C234 C240 C320 CL500 CL550 CLK320 CLS500 E320 GL320 GL450 GL550 ML, R, S Models

【Vehicle Compatibility】This air conditioner compressor with clutch fits for 2006-2011 for Mercedes-Benz B200 2.0L, 2002-2002 for C230 2.3L, 2001-2005 for C240 2.6L, 2001-2005 for C320 3.2L, 2002-2006 for CL500 5.0L, 2010-2010 for CL550 5.5L, 2004-2005 for CLK320 3.2L, 2006-2006 for CLS500 5.0L, 2004-2005 for E320 3.2L
‎【Replaces Part#】‎1010805, 1010807, 1110805, 1110807, 1210805, 1210807, 639834, TSP0155339, 4710466, 4710468, 4710581, 4710594, 4710596, 4711466. AC compressor fits 2009-2009 for GL320 3.0L, 2007-2012 for GL450 4.7L, 2008-2012 for GL550 5.5L, 2006-2011 for ML350 3.5L, 2006-2007 for ML500 5.0L, 2008-2011 for ML550 5.5L, 2010-2011 for R350 3.0L, 2006-2011 for R350 3.5L, 2006-2008 for R500 5.0L, 2006-2006 for S350 3.7L, 2002-2006 for S430 4.3L, 2000-2006 for S500 5.0L
【Product Specifications】Compressor Type:7SEU17C; OIL TYPE:PAG 100; Oil Prefilled:180ML; R-efrigerant Type: R134a; Pulley Grooves 6; Pulley Diameter (mm) 100
【Energy Saving & Durable 】This AC Air Conditioning Compressor kit provides efficient operation and great performance with low noise and minimal vibrations, ensuring a cool and comfortable ride. Built from high-strength aluminum alloy, it offers dependable performance, extended lifespan, and contributes to lower fuel consumption during steady driving
【Important reminders】Before installing your new compressor, ensure the AC system is fully cleaned (evaporate cleaning agents completely).For optimal results, we advise professional installation and commissioning

Bestseller No. 6

AC Compressor & 6-Groove A/C Clutch For Mercedes ML320 E320 S430 C280 E430 ML430 SLK230 CLK320 Replaces 7SBU16C – BuyAutoParts 60-00846NA New

Engineered for superior durability, backed by a one year, unlimited mileage warranty
Guaranteed Exact Fit for easy installation
100% BRAND NEW, premium ISO/TS 16949 quality – no core deposit or return required!
Fits many US-spec Mercedes models originally equipped with a 7SBU16C compressor, with 6-groove serpentine clutch pulley and round connector
Includes 1997-1999 E300 & S320, 1998-2002 E430 & CLK320, 2000-2002 S430, 1996-1999 S500, 1998-2000 CL500 & C43, 1996 C220 & S420, 1997-2000 C230, 1996-2000 C280, 1999-2003 CLK430, 2003 CLK320 Convertible, 1999-2002 ML320 & E55, 2002-2006 Sprinter, 2003 E320 Wagon, 1999-2001 ML430, 1996-1997 C36, 2001-2002 CLK55, 1996-2001 E300D, 1996-2002 E320, 1996-1997 E420, 2001 ML500, 2000 ML55, 1998-2004 SLK230 and 2001-2004 SLK320

Bestseller No. 7

A-Premium A/C Expansion Valve Compatible with Mercedes-Benz C-Class C220 C230 C280, E-Class E300 E320 E420 E430 E55 AMG, SLK230 CLK320 CLK430

[OEM Fit & Quality]: 100% Brand New Item. OE Replacement AC Block Expansion Valve, Aluminium
[Vehicle Fitment-1]: Compatible with Chevrolet Astra 2000 1.8L; Compatible with Mercedes-Benz W202 Series C220 1994-1997 2.2L, C230 1996-2000 2.3L, C280 1994-1998 2.8L, C280 1998-2000 2.8L, C36 AMG 1995-1997 3.6L, C43 AMG 1998-2000 4.3L, A208 Series CLK320 1998-2003 3.2L, CLK430 1999-2003 4.3L, CLK55 AMG 2001-2002 5.5L
[Vehicle Fitment-2]: Compatible with Mercedes-Benz W210 Series E300 1998-1999 3.0L, E320 1996-1997 3.2L, E320 1997-2002 3.2L, E420 1997-1999 4.2L, E430 1998-2002 4.3L, E55 AMG 2002 5.4L, E55 AMG 1998-2002 5.5L, R170 Series SLK230 1998-1999 2.3L
[Reference Number]: 38814, 4752018, 2028300184, A2028300184
[Buy with Confidence]: A-Premium offers a one-year unlimited-mileage guarantee on our meticulously crafted Air Conditioning Thermal Expansion Valve Kit. We offer a wide variety of automotive accessory categories, ensuring that you can hit the road with peace of mind.

Bestseller No. 8

HinLIaDa A/C AC Compressor With Clutch, For Mercedes-Benz E320/ML320 3.2L 1996 1997 1998 1999 2000 2001 2002 Air Conditioner Compressor & A/C Clutch Perfectly Match The Auto Parts Of The Original Car

【100% Brand New】High quality- tested to meet or exceed OEM specifications. It could correctly replace the original quality part.
【Feature】The air-conditioning compressor can provide enough pressure to increase power and reduce engine load. It greatly improves the cooling function. It has the characteristics of high efficiency, stability, safety and reliability.
【OEM Part Number】CO105111C, 7511631, 7512187, 295067NA, 5839, 5844, 32053
【Fitment】Air Conditioner Compressor W/ Clutch fit For Mercedes-Benz E320/ML320 3.2L 1996 1997 1998 1999 2000 2001 2002, Please Compare With Your Original One Before Purchasing! 100% Brand New and High Quality.
【Note】Before installing the air conditioning compressor pump, be sure to clean your car’s cooling system pipes. If there are debris or metal fragments in the pipes, the service life of the parts may be shortened.

Bestseller No. 9

A-Premium A/C Condenser Replace# 4814, 2108300270 – Compatible with Mercedes-Benz E-Class E300 1995-1997, E320 1996-2002, E420 1997-1997, E430 1998-2002, E55 AMG 1999-2002

[Vehicle Fitment-1]: Compatible with Mercedes-Benz E300 1995-1997, E420 1997-1997 — Fits W210 series only
[Vehicle Fitment-2]: Compatible with Mercedes-Benz E320 1996-2002, E430 1998-2002, E55 AMG 1999-2002 — Fits W210/W211 Series only
[Specification]: ①Built-in Receiver Dryer: No; ②Built-in Bracket: Yes; ③Core Length (IN): 22.375; ④Core Width (IN): 28.82; ⑤Core Thickness (IN): 0.82; ⑥Configuration: Parallel Flow; ⑦Built-in Oil Cooler: No
[Reference Number]: 4814, 2108300270, 2108300570
[Buy with Confidence]: A-Premium offers a one-year unlimited-mileage guarantee on our meticulously crafted ac condenser assembly. We offer a wide variety of automotive accessory categories, ensuring that you can hit the road with peace of mind.

Bestseller No. 10

PHILTOP 77356 Air Conditioning AC Compressor for E320 1996-2003, Crossfire 2004-2008, ML320 1998-2002, Sprinter 2500 2003-2006, Sprinter 2500 2002-2006

Compatibility: AC Compressor compatible with E320 1996-2003, ML320 1998-2002, Sprinter 2500 2003-2006, SLK230 1998-2001, Crossfire 2005-2006 3.2L, CLK320 1998-2002, C230 1997-2000, CLK430 1999-2003, E430 1998-2002, Crossfire 2004 2007-2008, SLK320 2001-2004, C280 1996-2000, ML430 1999-2001, Sprinter 3500 2003-2006, S320 1996-1999, E300 1996-1999, E420 1997, ML500 2002, CLK320 2003 3.2L, E55 AMG 1999-2003, Sprinter 2500 2002-2006, CLK55 AMG 2001-2002
Direct Replacement: AC Compressor replacement for 1520971, 11105111, 5097010AA, 639307, CS20084, 4710293, 4711293, 77356, 78356, 2041697, 5511631, 6511631, 7511631, 295067NA, 0002302011, 2302011, 32053, 2011112, 142986C, 2369, 1440N, 21635, 10343180, 10347421, C1942, C2049, 0610045, TEM275638, 275638, DW77356, 3003760
Premium Alumium Material: This ac air compressor is a replacement compressor and clutch. Its main body is made of high-strength aluminum material, which is durable, rigid, and wearable. It will not crack, break, or leak. Such high-quality ensures a long-time use for each compressor kit
Strong Cooling Function: The auto ac compressor can provide sufficient pressure, which increases power force and decreases engine load. It dramatically improves the cooling function: features as high and stable efficiency, safety, and reliability
Low Noise & Low Fuel Consumption: AC compressor works excellent and has low noise with a better experience. With a lower load factor, low power will be input when driving at high speed, which increases fuel economy and makes operation smoothly

Understanding the AC Compressor

Before we dive into troubleshooting and resolving the issue of a non-functioning AC compressor in your 1999 Mercedes E320, let’s take a moment to understand the role and importance of this component.

The AC compressor plays a crucial role in your car’s air conditioning system. It is responsible for compressing the refrigerant and circulating it through the system, allowing the heat to be drawn out and the cool air to be distributed throughout the cabin. Without a properly functioning AC compressor, you’ll be left with hot and stuffy air, making your drives uncomfortable, especially during those sweltering summer months.

The Possible Culprits

Now that you understand the significance of the AC compressor, let’s explore the potential reasons for its malfunction.

1. Wear and Tear:

Over time, the AC compressor may experience wear and tear due to its constant usage. This can lead to mechanical failures, such as damaged pistons, valves, or bearings, which can prevent the compressor from functioning properly.

2. Electrical Issues:

Electrical problems can also contribute to a non-working AC compressor. Faulty wiring, blown fuses, or a malfunctioning clutch can disrupt the electrical flow and prevent the compressor from engaging.

3. Refrigerant Leaks:

One of the most common causes of AC compressor failure is refrigerant leaks. The refrigerant plays a vital role in the cooling process, and when there’s a leak, it not only affects the compressor’s performance but also puts additional strain on the entire AC system.

Troubleshooting and Resolving the Issue

Now that we’ve explored the possible culprits behind a non-working AC compressor, let’s move on to troubleshooting and resolving the issue.

Step 1: Check for Power

Start by checking if power is reaching your AC compressor. You can do this by using a multimeter to test the electrical connections and ensure that there is a steady flow of electricity.

If there is no power reaching the compressor, you may need to inspect the wiring and connections for any signs of damage or corrosion. Replace any faulty components and ensure that all connections are secure.

Step 2: Inspect the Clutch

The clutch is responsible for engaging and disengaging the AC compressor. If the clutch is not functioning correctly, the compressor won’t turn on.

Inspect the clutch for any signs of damage or wear. Look for frayed or broken wires, worn-out bearings, or a loose clutch plate. If you notice any issues, it’s best to replace the clutch assembly to ensure proper functioning of the compressor.

Step 3: Check for Refrigerant Leaks

As mentioned earlier, refrigerant leaks can cause the AC compressor to malfunction. To check for leaks, you’ll need to use an electronic leak detector or UV dye.

If a leak is detected, you’ll need to locate the source and repair it. Keep in mind that refrigerant leaks should be handled by a professional, as they require specialized equipment and expertise.

Step 4: Test the Pressure

Testing the pressure in your AC system can provide valuable insights into the health of the compressor. Use a manifold gauge set to measure the high and low side pressures.

If the pressure readings are outside the manufacturer’s specified range, it indicates a problem with the compressor or other components in the system. Consult a professional to diagnose the issue and perform any necessary repairs.

Preventive Maintenance and Care

Now that you’ve successfully resolved the issue with your AC compressor, it’s essential to implement preventive maintenance and care practices to ensure its optimal performance in the long run.

Regular Inspections

Regularly inspect your AC system, including the compressor, for any signs of damage or wear. Look out for oil stains, refrigerant leaks, or unusual noises. Timely detection of issues can prevent major failures and costly repairs.

Clean the Condenser

The condenser, located in front of your radiator, plays a crucial role in dissipating heat from the refrigerant. Over time, it can become clogged with dirt, debris, and bugs, hindering its performance. Regularly clean the condenser to optimize its efficiency.

Replace Filters

Dirty or clogged filters can restrict airflow, putting unnecessary strain on the AC system, including the compressor. Replace the cabin air filter and the engine air filter at regular intervals to maintain proper airflow.

Use the AC System Regularly

Refrigerant leaks are often caused by seals drying out and becoming brittle due to inactivity. To prevent this, it’s essential to use your AC system regularly. Even during the cooler months, run the AC for a few minutes every week to keep the seals lubricated and in good condition.

Congratulations! You’ve successfully diagnosed and resolved the issue with your 1999 Mercedes E320’s AC compressor. By following the troubleshooting steps and implementing preventive maintenance practices, you can ensure that your AC system remains in optimal condition, providing you with cool comfort during your drives.

Remember, while DIY repairs can be satisfying, it’s always best to consult a professional for complex issues or if you’re unsure about any aspect of the repair process. Stay cool and enjoy the luxury of your Mercedes E320!

How to diagnose air conditioner A/C

Frequently Asked Questions (FAQ)

Why is the AC compressor in my 1999 Mercedes E320 not working?

Possible reasons for a non-functioning AC compressor in a 1999 Mercedes E320 include low refrigerant levels, a faulty compressor clutch, or electrical issues.

How can I diagnose the issue with the AC compressor in my 1999 Mercedes E320?

It is recommended to have a professional mechanic check the refrigerant levels, visually inspect the compressor clutch, and test the electrical connections to diagnose the problem accurately.

Can I repair the AC compressor in my 1999 Mercedes E320 myself?

AC compressor repairs can be complex and require specialized tools. It is usually best to have a professional handle the repair to ensure it is done correctly.

How much does it cost to replace the AC compressor in a 1999 Mercedes E320?

The cost of replacing an AC compressor in a 1999 Mercedes E320 can vary, but it is typically between $500 and $900, including parts and labor.

Is it necessary to replace the entire AC system if the compressor is faulty?

In most cases, only the faulty AC compressor needs to be replaced. However, it is recommended to have the rest of the system inspected to ensure there are no additional issues.

Final Words: Ensuring the Performance and Longevity of Your AC Compressor in Your 1999 Mercedes E320

In conclusion, understanding the AC compressor and its role in the air conditioning system of your 1999 Mercedes E320 is crucial for troubleshooting and resolving any issues. The possible culprits for a non-working AC compressor include wear and tear, electrical issues, and refrigerant leaks.

To resolve the issue, you can start by checking if power is reaching the compressor and inspecting the clutch for any damage. Checking for refrigerant leaks and testing the pressure in the AC system are also important steps in the troubleshooting process.

Implementing preventive maintenance and care practices can help ensure the optimal performance of your AC compressor in the long run. Regular inspections, cleaning the condenser, replacing filters, and using the AC system regularly are all important steps to maintain the compressor’s functionality. It is important to note that while DIY repairs can be satisfying, it is best to consult a professional for complex issues or if you are unsure about any aspect of the repair process.

By following these steps and taking proper care of your AC compressor, you can enjoy cool comfort during your drives in your 1999 Mercedes E320. Keep cool and enjoy the luxury of your car!

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1999 Mercedes E320 Ac Compressor Not Working: Troubleshooting Guide