W211 AMG Discuss the W211 AMG's such as the E55 and the E63

AC Compressor Test

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old Aug 8, 2022 | 10:46 PM
  #1  
Rallyboy383's Avatar
Thread Starter
Member
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2013
Posts: 165
Likes: 7
2004 E55
AC Compressor Test

Is there a way to test the AC compressor to see if it working? My AC just stopped blowing cold without any warning. 2004 E55


When I turned the ac on the current consumption of the compressor was at 700 and the request to component was at 70.

Last edited by Rallyboy383; Aug 9, 2022 at 11:56 AM.
Reply
Old Aug 9, 2022 | 08:36 AM
  #2  
machild's Avatar
MBWorld Fanatic!
5 Year Member
Photogenic
 
Joined: Jun 2020
Posts: 1,177
Likes: 314
2006 CLS55 AMG, 2005 SLK 350 AMG
Originally Posted by Rallyboy383
Is there a way to test the AC compressor to see if it working? My AC just stopped blowing cold without any warning. 2004 E55
You can put your hand on the two pipes connected to the expansion valve and see if one is cold. But, the best way is to use an appropriate fault reader (MB Star) and see what is going on with the system. There is a lot more to the system than just whether the compressor is 'working'.
Reply
Old Aug 9, 2022 | 09:23 AM
  #3  
Rallyboy383's Avatar
Thread Starter
Member
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2013
Posts: 165
Likes: 7
2004 E55
Originally Posted by machild
You can put your hand on the two pipes connected to the expansion valve and see if one is cold. But, the best way is to use an appropriate fault reader (MB Star) and see what is going on with the system. There is a lot more to the system than just whether the compressor is 'working'.
Thank you for the quick reply! The pipes are not cold! I connected my Icarsoft MB2 and ran a diagnostic test. Nothing really seemed to jump out at me. There were not any faults listed. I will take a screen shot of what I see on my diagnostic tool and post the results.
Reply
Old Aug 9, 2022 | 11:33 AM
  #4  
Rallyboy383's Avatar
Thread Starter
Member
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2013
Posts: 165
Likes: 7
2004 E55
Well, I had the system vacuumed down and the refrigerant recovered. System held vacuum with no problem. Then the system was recharged to 2.10 lbs of freon. Tried to operate the ac and the ac/rest light blinks. Compressor issue maybe?
Reply
Old Aug 9, 2022 | 01:11 PM
  #5  
machild's Avatar
MBWorld Fanatic!
5 Year Member
Photogenic
 
Joined: Jun 2020
Posts: 1,177
Likes: 314
2006 CLS55 AMG, 2005 SLK 350 AMG
Originally Posted by Rallyboy383
Is there a way to test the AC compressor to see if it working? My AC just stopped blowing cold without any warning. 2004 E55


When I turned the ac on the current consumption of the compressor was at 700 and the request to component was at 70.
The consumption was 700 what - milliamps? The 70 was - 70%? Was that percentage when the temps for everything including inside the car was in the 35C range?
Reply

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


You have already rated this thread Rating: Thread Rating: 0 votes,  average.


All times are GMT -4. The time now is 04:12 AM.

story-0
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

Slideshow: Not every Mercedes design becomes timeless, some feel stuck in the era they came from.

By Verdad Gallardo | 2026-05-12 18:09:07


VIEW MORE
story-1
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

Slideshow: Yes, Mercedes built manual cars, and some of them are far more interesting than you'd expect.

By Verdad Gallardo | 2026-05-02 12:36:58


VIEW MORE
story-2
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.

By Verdad Gallardo | 2026-04-29 11:19:28


VIEW MORE
story-3
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

Slideshow: Before curves took over, Mercedes mastered the art of the straight line, and some of those shapes still look right today.

By Verdad Gallardo | 2026-04-25 12:05:49


VIEW MORE
story-4
Flawlessly Restored Mercedes 190E Evo II Heads to Auction

Slideshow: The 190E Evolution II shows how a homologation necessity became a six-figure collector icon.

By Verdad Gallardo | 2026-04-22 17:53:47


VIEW MORE
story-5
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

Slideshow: Mercedes is turning one of its core nameplates electric, and the details show just how serious this shift is.

By Verdad Gallardo | 2026-04-21 13:58:06


VIEW MORE
story-6
Mercedes EQS Gets A Major Update: Everything You Need to Know

Slideshow: Faster charging, longer range, and a controversial steer-by-wire system define the latest evolution of Mercedes-Benz EQS.

By Verdad Gallardo | 2026-04-15 10:35:34


VIEW MORE
story-7
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

Slideshow: These overlooked Mercedes-Benz models never got the spotlight, but they quietly delivered more than most remember.

By Verdad Gallardo | 2026-04-13 19:35:45


VIEW MORE
story-8
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

Slideshow: A well-used 1991 Mercedes-Benz 300D with more than one million miles is now looking for a new owner, and it still appears ready for more.

By Verdad Gallardo | 2026-04-10 10:05:15


VIEW MORE
story-9
10 Most Reliable Mercedes-Benz Models You Can Buy Used

Slideshow: From bulletproof sedans to surprisingly tough SUVs, these Mercedes models proved that the three-pointed star can go the distance.

By Verdad Gallardo | 2026-04-08 09:55:49


VIEW MORE