Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help

Go Back   PeachParts Mercedes ShopForum > Technical Information and Support > Tech Help

LinkBack Thread Tools Display Modes
Old 05-17-2003, 04:20 PM
Registered User
Join Date: Aug 2001
Location: Ohio
Posts: 183
AC Problems with 96 C280


Having AC problems, very weak cooling. Compressor clutch ativates and compressor turns. No strange sounds.

Have gauges and may need to pump down system and recharge to check for leaks.

Anyone know how much R134a the system holds and where are the hi side and low side connectors on this car.

Also if anyone knows the appoximate high and low side pressures it would be great.

Martineau Gauda

96 C280 Mercedes
82 Rolls Royce Silver Spur
Reply With Quote
Old 05-18-2003, 10:11 AM
Posts: n/a
You don't need to evacuate to check for leaks, just put some UV dye in the existing charge since the compressor is still kicking in. Then use a UV light after a day or so to look for leaks. If you find no leaks at a connection, look at the condensation drain water with the UV lamp. If there is UV in the water, the problem is the evaporator.

High side connection is somewhere in line around filter drier. Low side is somewhere in line between compressor and evaporator.

It would be best to do some reading for safety sake. Without a/c understanding you can hurt yourself or your car.

Good luck,
Reply With Quote
Old 05-18-2003, 10:41 AM
Registered User
Join Date: Aug 2001
Location: Ohio
Posts: 183
Thanks Larry,

I fully agree with your caution, persons must be very careful while the gauges are connected to the high side. If the high side is opened while adding refrigerant the can may explode!

I am familar with AC systems and have done all the AC work on my Rolls and my other cars for many years. This is the first time I have had problems with the Mercedes AC system.

I want to evacuate the system and see if the system holds vacuum then add the prescribed amount of refrigerant before extensive dye leak testing. The proplem may simply be a loss of 1 once per year.

I found a placard that the system uses 1.9 lb of refrigerant.
I can find the low side fitting but I still have not found the high side fitting in the engine compartment. Could it be under the car?

I am trying to get the pressures. Is the standard 2.2 X F ambient rule for the high side applicable to this car?

Many Thanks
Martineau Gauda

96 C280 Mercedes
82 Rolls Royce Silver Spur
Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 01:32 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page