problem - '06 C55 dies at idle
Thread Starter
MBWorld Fanatic!
Joined: Feb 2007
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From: Houston - Clear Lake
C63 coupe, Z3M Roadster garage queen
problem - '06 C55 dies at idle
2006 C55 has been having problems over last couple months. When stopped or slow rolling at very low speeds without any throttle, car sometimes has a brief stumble, sometimes throttle surges and drops back, and sometimes dies. It’s dying about 3 or 4 times a week. It’s not throwing any codes or warning lights. It always starts back up immediately so I’m guessing its not a CPS problem. Dealer has spent days hunting but has not found anything wrong and has not been able to replicate the problem. Anyone else had similar problems? Any suggestions about how to diagnose?
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Joined: Mar 2007
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From: Houston, TX
C32/C55 AMG
2006 C55 has been having problems over last couple months. When stopped or slow rolling at very low speeds without any throttle, car sometimes has a brief stumble, sometimes throttle surges and drops back, and sometimes dies. It’s dying about 3 or 4 times a week. It’s not throwing any codes or warning lights. It always starts back up immediately so I’m guessing its not a CPS problem. Dealer has spent days hunting but has not found anything wrong and has not been able to replicate the problem. Anyone else had similar problems? Any suggestions about how to diagnose?
Are you using a dealer, Alex Rodriguez by any chance? I have had great experiences with them.
Thread Starter
MBWorld Fanatic!
Joined: Feb 2007
Posts: 1,308
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From: Houston - Clear Lake
C63 coupe, Z3M Roadster garage queen
Thanks for the quick help! I too am using ARod and, unlike most of the dealership we read about here, they really have been good to work with.
My past expereiences with CPS on other cars, and most of what I've read, all have one thing in common - the car is usually unable to start back up until it has been sitting for a while. I considered this as a possibility but mine has ALWAYS been able to start back up immediately. Also, CPS also seems to strike randomly. My car's problem only happens when I'm slow or stopped with my foot off the gas. It's a pretty ugly feeling when you've slowed down to whip a U-turn and the car dies mid-turn and power steering disappears!
Are you down on the ARod side of town?
My past expereiences with CPS on other cars, and most of what I've read, all have one thing in common - the car is usually unable to start back up until it has been sitting for a while. I considered this as a possibility but mine has ALWAYS been able to start back up immediately. Also, CPS also seems to strike randomly. My car's problem only happens when I'm slow or stopped with my foot off the gas. It's a pretty ugly feeling when you've slowed down to whip a U-turn and the car dies mid-turn and power steering disappears!
Are you down on the ARod side of town?
Super Member
Joined: Mar 2007
Posts: 946
Likes: 1
From: Bay Area
03 C32 gone, 06 CLS55, 16 Tesla X
CPS is not my first choice. If you like to spend some useful money that may help or fix the problem then here is my list
1) Injector cleaning addictive like Techron $6?
2) Spark plugs $80-$120?
3) Check the fuel filter, if it’s clogged $50
4) If it’s jerk when it shift then change the trans oil $150?
You may have already tried these, but it won't hurt
1) Injector cleaning addictive like Techron $6?
2) Spark plugs $80-$120?
3) Check the fuel filter, if it’s clogged $50
4) If it’s jerk when it shift then change the trans oil $150?
You may have already tried these, but it won't hurt
Former Vendor of MBWorld
Joined: Sep 2008
Posts: 1,935
Likes: 5
AMG
MAS or possible vacuum leak some where in the intake system (after the MAS). Injector cleaner would certainly be recommended on any car 4 years or older, but that doesn't appear to be the issue here (although it may help alleviate the problem).
4 years for and MAS is about avg so it may be starting to give. Might not be a bad time to clean out / replace your airfilters as well. If you don't want to buy a new set, just tap out the old ones on a flat surface to get any loose dirt out and then just vacuum them on body sides w/ a shop vac.
hope that helps...
4 years for and MAS is about avg so it may be starting to give. Might not be a bad time to clean out / replace your airfilters as well. If you don't want to buy a new set, just tap out the old ones on a flat surface to get any loose dirt out and then just vacuum them on body sides w/ a shop vac.
hope that helps...
Super Member
Joined: Aug 2007
Posts: 876
Likes: 81
From: Phoenix AZ & Cayucos CA
’27 AMG SL55(ordered), ‘23 EQS 580 SUV, ‘19 AMG E53 Cpe, ‘48 Willys Jeepster
CPS is not my first choice. If you like to spend some useful money that may help or fix the problem then here is my list
1) Injector cleaning addictive like Techron $6?
2) Spark plugs $80-$120?
3) Check the fuel filter, if it’s clogged $50
4) If it’s jerk when it shift then change the trans oil $150?
You may have already tried these, but it won't hurt
1) Injector cleaning addictive like Techron $6?
2) Spark plugs $80-$120?
3) Check the fuel filter, if it’s clogged $50
4) If it’s jerk when it shift then change the trans oil $150?
You may have already tried these, but it won't hurt
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MBWorld Fanatic!
Joined: Mar 2007
Posts: 1,948
Likes: 3
From: Houston, TX
C32/C55 AMG
Thanks for the quick help! I too am using ARod and, unlike most of the dealership we read about here, they really have been good to work with.
My past expereiences with CPS on other cars, and most of what I've read, all have one thing in common - the car is usually unable to start back up until it has been sitting for a while. I considered this as a possibility but mine has ALWAYS been able to start back up immediately. Also, CPS also seems to strike randomly. My car's problem only happens when I'm slow or stopped with my foot off the gas. It's a pretty ugly feeling when you've slowed down to whip a U-turn and the car dies mid-turn and power steering disappears!
Are you down on the ARod side of town?
My past expereiences with CPS on other cars, and most of what I've read, all have one thing in common - the car is usually unable to start back up until it has been sitting for a while. I considered this as a possibility but mine has ALWAYS been able to start back up immediately. Also, CPS also seems to strike randomly. My car's problem only happens when I'm slow or stopped with my foot off the gas. It's a pretty ugly feeling when you've slowed down to whip a U-turn and the car dies mid-turn and power steering disappears!
Are you down on the ARod side of town?
Listen to the people above, I have no experience with the C55 as I drive a C32. Good Luck, Maf cleaning sounds like the way to go.
Former Vendor of MBWorld
Joined: Sep 2008
Posts: 1,935
Likes: 5
AMG
Cleaning throttle body does help normally, however benz throttle plates never fully close. Idle is modulated by the plate itself so it shouldn't be an issue here.
You may also want to get an injector cleaning service done. Usually its about $150 but makes the car run like new. If you don't want to spend that much, just throw 1-2 bottles of seafoam in a half tank of gas and run the car hard... that should clean out most of the gunk in the system.
You may also want to get an injector cleaning service done. Usually its about $150 but makes the car run like new. If you don't want to spend that much, just throw 1-2 bottles of seafoam in a half tank of gas and run the car hard... that should clean out most of the gunk in the system.
MBWorld Fanatic!
Joined: Feb 2004
Posts: 1,001
Likes: 37
From: NY
2014 E350 4Matic
MAS or possible vacuum leak some where in the intake system (after the MAS). Injector cleaner would certainly be recommended on any car 4 years or older, but that doesn't appear to be the issue here (although it may help alleviate the problem).
4 years for and MAS is about avg so it may be starting to give. Might not be a bad time to clean out / replace your airfilters as well. If you don't want to buy a new set, just tap out the old ones on a flat surface to get any loose dirt out and then just vacuum them on body sides w/ a shop vac.
hope that helps...
4 years for and MAS is about avg so it may be starting to give. Might not be a bad time to clean out / replace your airfilters as well. If you don't want to buy a new set, just tap out the old ones on a flat surface to get any loose dirt out and then just vacuum them on body sides w/ a shop vac.
hope that helps...
Thread Starter
MBWorld Fanatic!
Joined: Feb 2007
Posts: 1,308
Likes: 80
From: Houston - Clear Lake
C63 coupe, Z3M Roadster garage queen
We checked through all the warranty records today and it looks like the MAF is only a year or two old. Still can't rule it out based on the feedback above from others whose identical problem was fixed by a new one, but . . .
Anyone had problems with tourque converter failing? I'm wondering if it might have similar symptoms.
I am the happy temporary owner of a data logger that one of the dealership mechanics has loaned me. The car has been dying intermittently but it's now happening every couple of days and sometimes even twice a day. I'm hoping this will give us some better clues. I'll provide updates if we find anything, but in the interim would still really appreciate the ongoing flow of good ideas from the experts here!
Anyone had problems with tourque converter failing? I'm wondering if it might have similar symptoms.
I am the happy temporary owner of a data logger that one of the dealership mechanics has loaned me. The car has been dying intermittently but it's now happening every couple of days and sometimes even twice a day. I'm hoping this will give us some better clues. I'll provide updates if we find anything, but in the interim would still really appreciate the ongoing flow of good ideas from the experts here!
Thread Starter
MBWorld Fanatic!
Joined: Feb 2007
Posts: 1,308
Likes: 80
From: Houston - Clear Lake
C63 coupe, Z3M Roadster garage queen
Problem finally solved. Cause was a bad electrical connection at the end of the cable from the ECU. Kudos to the team at A-Rod MB in Houston - they rock!
Thread Starter
MBWorld Fanatic!
Joined: Feb 2007
Posts: 1,308
Likes: 80
From: Houston - Clear Lake
C63 coupe, Z3M Roadster garage queen
betrezra,
I'm honestly not sure how they found the problem. Intermittent failures like this are always a *****. Lots of data logging and careful review of the symptoms led them to conclude that the problem was electrical and likely in the ECU circuit. The issue wasn't as easy as damaged insulation - it was apparently a multi-pin plug at the end of the wiring loom that wasn't making a good connection to whatever it was plugged into. Cleaning and tightening made an immediate difference and seems to have cured things. The C55 is fun to drive again, and the A-Rod team has really impressed me!
I'm honestly not sure how they found the problem. Intermittent failures like this are always a *****. Lots of data logging and careful review of the symptoms led them to conclude that the problem was electrical and likely in the ECU circuit. The issue wasn't as easy as damaged insulation - it was apparently a multi-pin plug at the end of the wiring loom that wasn't making a good connection to whatever it was plugged into. Cleaning and tightening made an immediate difference and seems to have cured things. The C55 is fun to drive again, and the A-Rod team has really impressed me!
