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-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help

LinkBack Thread Tools Display Modes
Old 12-03-2008, 06:46 PM
Registered User
Join Date: Dec 2008
Posts: 3
'97 C-230 EC Problem

Every winter the EC (Economy Mode) light comes on & stays on. No problem for winter but when you need the AC in the summer the EC mode keeps the AC from working.

The local MB service guys replaced a control unit a year and a half a ago. Winter of '07, you guessed it, the EC problem popped up again. Last June they decided to replace the AC compressor & receiver dryer.

Guess which light lit up last Monday? Yup. "EC." Won't turn off.

1) Anybody know how to turn the EC off?

2) Does it sound like the dealer service guys have a clue?

3) How do you contact a zone rep & can they be helpful?


Reply With Quote
Old 12-03-2008, 08:42 PM
Registered User
Join Date: Oct 2005
Posts: 4,263
You need to search for the procedure to extract trouble codes and current sensor values from your climate control pushbutton unit. That is, if you have one.
Reply With Quote
Old 12-03-2008, 11:03 PM
Registered User
Join Date: Dec 2008
Posts: 3
Thanks Matt but, huh?
Reply With Quote
Old 12-04-2008, 01:59 AM
whipplem104's Avatar
Registered User
Join Date: Oct 2008
Location: seattle
Posts: 1,177
This is most likely related to a sensor problem. The evaporator temp sensors go bad causing the system to go into ec mode and also the pressure sensors.
There could also be a coding error. The control unit can be coded to not recognized the pressure sensor, possibly. I do not remember if the c class did this.
Really sounds like a evaporator temp sensor to me though.
Reply With Quote
Old 12-04-2008, 08:11 AM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
To start with you are suggesting the car has a auto climate control problem.

The work that was done was related to basic A/C system.

IN MOST cases they aren't related.

As suggested the climate control system HAS self-diagnostic abilities.
Try searching for the sequence that allows that self diagnostics.

MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator
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 04:09 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, 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