Go Back   MBWorld.org Forums > Mercedes-Benz Sedans > C-Class (W203)
Sign in using an external account
Register Forgot Password?

C-Class (W203) 2001-2007, C160, C180, C200, C220, C230, C240, C270, C280, C300, C320, C230K, C350, Coupe

Sponsored by : My Mercedes Parts
Click Here

Welcome to MBWorld.org!
Welcome to MBWorld,

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!


Reply
 
 
 
 
LinkBack Thread Tools Search this Thread Rate Thread Display Modes
Old 09-29-2009, 07:47 PM   #1
Member
 
Join Date: Aug 2004
Location: Boston, MA
Posts: 189
Drives: 2005 E320, 2004 C240 4Matic, 2001 S430
2004 C240 4Matic stalling when cold, overall power loss

Hi

I am having the following issues with a 2004 C240 4 Matic:
- every morning (or when the engine gets cold), if I start driving or just rev the engine in park, the car stalls really bad (sounds like a misfire) once or twice and then it is fine. I doubt it is a matter of the car, coils, spark plugs etc heating up as this happens right after starting it and disappears as soon as I rev the engine over 3-4000 RPMs. No misfire codes are stored in the vehicle's computer and changing the spark plugs did not solve the problem
- overall I notice a loss of power, like the gas pedal is "heavy". Every 200 miles or so the following codes come up: P0171, P0174 and P0101. The first two are lean codes and the last seems to be a MAF. Could all of the above problems be related to the MAF?

Any help would be greatly appreciated, thanks guys!
To remove this ad, register today or login if you already are registered!

intrinsico is offline   Reply With Quote
Old 10-02-2009, 02:25 PM   #2
Junior Member
 
Join Date: Aug 2006
Location: Seattle, WA
Posts: 24
Drives: 2001 C320
I had a similar issue with my 2001 C320 around 95,000 miles. It only happened when the car was cold and it would feel like the car was about to stall and then would jump back to life and take off. I replaced my MAF and haven't had any problems since.

I also just replaced my crankshaft position sensor (at 105,000 miles) but that was causing the car to completely shut down and not restart until cool so it sounds more like a MAF problem then CPS.
csaunder is offline   Reply With Quote
Old 10-07-2009, 06:15 AM   #3
Member
 
Join Date: Aug 2004
Location: Boston, MA
Posts: 189
Drives: 2005 E320, 2004 C240 4Matic, 2001 S430
I think it's the MAF. What is a cheap place to buy the MAF insert? Thank you!
intrinsico is offline   Reply With Quote
Old 10-07-2009, 07:31 AM   #4
Super Moderator
 
Glyn M Ruck's Avatar
 
Join Date: Jun 2008
Location: Llandudno, Cape Town, South Africa
Posts: 18,267
Drives: late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
P0171 = System too Lean (Bank 1)
P0174 = System too Lean (Bank 2)
P0101 = Mass or Volume Circuit Range Performance Problem

This is undoubtedly the MAF. You can try cleaning it but likely need a new one.

Please make sure you get the correct OE MAF. The MB part number is on the black plastic cover. There are VW/Audi MAFs out there on the internet that look identical & fit but won't work properly with a Benz - different calibration.

Buy from a reputable Benz spares supplier - You don't need to be ripped off by a dealer.
__________________

Llandudno, Cape Town, South Africa
Glyn M Ruck is offline   Reply With Quote
Old 10-07-2009, 04:47 PM   #5
MBWorld Fanatic!
 
Join Date: Jul 2008
Posts: 6,388
Drives: 2009 E350 Sport
I can't imagine what a C240 4Matic must feel when it suffers a "loss of power". It's good that this isn't a tricky situation, you have a clear diagnosis.
__________________
Past:
2005 C230K Sport 7/2008-9/2012
2011 C300 Sport 4/2013-10/2013

LILBENZ230 is offline   Reply With Quote
Old 10-11-2009, 08:41 AM   #6
Member
 
Join Date: Aug 2004
Location: Boston, MA
Posts: 189
Drives: 2005 E320, 2004 C240 4Matic, 2001 S430
Any preferred suppliers that sell the OEM MAF or just the insert? I can imagine many people had to do this so the list of sources to get one narrowed down. Thank you again!
intrinsico is offline   Reply With Quote
Old 10-11-2009, 08:41 AM
 
 
 
Reply

Tags
2003, 2004, 4matic, benz, c240, cold, injector, loss, mercedes, power, problems, runner, stalling, start, toyota



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

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

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 Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off




All times are GMT -4. The time now is 05:05 PM.


Copyright 2001-2012 InternetBrands, Inc. / MBWorld.org. All Rights Reserved.
Everyone's Personal Details