Odd issue - ESP/TCS disabling when flooring it from a standstill
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Joined: Aug 2016
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'11 E350 4Matic Sport
Odd issue - ESP/TCS disabling when flooring it from a standstill
So really weird issue with my '11 E350 4Matic.
Today was my first time matting the accelerator from a complete stop, just for fun to see what kind of off the line performance Helga has. Yes previously I have been able to punch it down for passing, etc but never from complete stop. Well immediately the ESP and TCS disabled and got the warning triangle, ESP off light and the notice in the cluster and the car went into this horrific limp mode where it cut power to probably 25% (could barely get up the hill I was climbing and had to put my hazards on), the power would come back after maybe ~5 seconds.
So turn car off and back on and everything is back to normal, decide to try again and sure enough same exact result. It is so odd as I can hit the gas anywhere up to hitting the stop and everything is fine, also I can hit the pedal stop while moving and everything is normal. It's only from a complete standstill it does this and it will always reset itself after a shutoff and restart.
Any ideas, my only thought is a failing throttle position sensor.
Today was my first time matting the accelerator from a complete stop, just for fun to see what kind of off the line performance Helga has. Yes previously I have been able to punch it down for passing, etc but never from complete stop. Well immediately the ESP and TCS disabled and got the warning triangle, ESP off light and the notice in the cluster and the car went into this horrific limp mode where it cut power to probably 25% (could barely get up the hill I was climbing and had to put my hazards on), the power would come back after maybe ~5 seconds.
So turn car off and back on and everything is back to normal, decide to try again and sure enough same exact result. It is so odd as I can hit the gas anywhere up to hitting the stop and everything is fine, also I can hit the pedal stop while moving and everything is normal. It's only from a complete standstill it does this and it will always reset itself after a shutoff and restart.
Any ideas, my only thought is a failing throttle position sensor.
Thread Starter
Member
Joined: Aug 2016
Posts: 130
Likes: 18
'11 E350 4Matic Sport
So after doing some additional digging it seems this is a pedal assembly fault, found a few people with W203 C32 AMG and W204 C63 that had this same issue. Going to try to replace the pedal assembly (looks pretty easy) and will report back, just more reason to upgrade to the metal style pedals. 
Thread Starter
Member
Joined: Aug 2016
Posts: 130
Likes: 18
'11 E350 4Matic Sport
So quick update, replacement accelerator assembly worked!! Not bad price ($122+tax) and less than 5 mins to replace (two 13mm plastic nuts and the electrical connector). Only tried 2x full throttle from a stop and no limp mode, also my old pedal did not have the kick down click where the new one now does.
Appears MB has updated the part # too - old # is A 204 300 11 04 new # is A 222 300 09 00.
Just wanted to to let y'all know as it seems this issue could hit any MB as I learned of the pedal issue from the W204 C63 forum.
Appears MB has updated the part # too - old # is A 204 300 11 04 new # is A 222 300 09 00.
Just wanted to to let y'all know as it seems this issue could hit any MB as I learned of the pedal issue from the W204 C63 forum.
