Help - engine revving on its own in Park
Thread Starter
Newbie
Joined: May 2008
Posts: 5
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C300
Help - engine revving on its own in Park
Ive got a problem with my 2 mth old C. Its never happened before, but just today when i got home and left it in Park, the engine decides to start revving, and it revs like how you would stomp on the pedal and let it go, stomp on it and let it go....as if it is getting ready to sprint off from start at a drag race.
Anyone had this problem?? and do you know why?? im going to bring it to the dealer but just wanted to know if anyone had this problem...
Anyone had this problem?? and do you know why?? im going to bring it to the dealer but just wanted to know if anyone had this problem...
MBWorld Fanatic!
Joined: Nov 2007
Posts: 1,008
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From: Irvine, CA
C300 Sport, MM, P1
its the beast inside your car and it wants to go fast! jk. you seriously need to take it to a dealer and have them replace some parts. This is the first i've heard of a car reving on its own in park.
Senior Member
Joined: Mar 2008
Posts: 418
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08 MB
I never understand why people with a new car and service issues ask for help when they have help from their warranties. Take the car to the dealer and let them figure out the problem while you cruise around in a rental and go about your day.
Super Member
Joined: Jul 2007
Posts: 636
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From: Orange County, Ca
C350
Because lots of dealers are full of BS & will try to do anything to get out of a repair. So loading up with ammo from this forum is a way to go to the dealer with an educated guess to provide support when they say they dont see the problem or that they can not reproduce the problem.
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Senior Member
Joined: Mar 2008
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08 MB
Because lots of dealers are full of BS & will try to do anything to get out of a repair. So loading up with ammo from this forum is a way to go to the dealer with an educated guess to provide support when they say they dont see the problem or that they can not reproduce the problem.
But do you really think something like this can be diagnosed over the internet especially when little information is known except "the car revs". I've been involved with cars for a long time and that tells me nothing except time to get the diagnostic tools out that I'm sure most people don't have.
I'm not a fan of dealers either but they aren't so bad as not wanting to fix anything.
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Senior Member
Joined: Jun 2008
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08-C350 black/black
i noticed one day while walking bak to the car...which was still on....i could hear it idling from like two car rows away...at first didnt know wut the noise was till i got closer to my car...it sounded like someone in the car was revving it up but that was not the case...is this sorta wut you heard? if different is this a problem should i have it checked out....it doesnt do it all the time...note it was over 100 degrees that day....maybe cause the ac was on full...dont know but it was loud!!
Super Member
Joined: Jul 2007
Posts: 636
Likes: 3
From: Orange County, Ca
C350
But do you really think something like this can be diagnosed over the internet especially when little information is known except "the car revs". I've been involved with cars for a long time and that tells me nothing except time to get the diagnostic tools out that I'm sure most people don't have.
I'm not a fan of dealers either but they aren't so bad as not wanting to fix anything.
I'm not a fan of dealers either but they aren't so bad as not wanting to fix anything.
If someone else has had this problem before & found out how to fix it, that is good information to take to the dealer to say "I have heard that people with this problem have had it fixed by replacing the _______".
Super Member
Joined: Jul 2002
Posts: 678
Likes: 1
From: Vancouver WA
'14 GLK250 Diesel
Sounds like the idle control circuit, which is a combination of software and injection hardware, is amiss. Not common, but not unheard of, either.
Off to the dealer for a good diagnosis.
Off to the dealer for a good diagnosis.
MBWorld Fanatic!
Joined: Nov 2007
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From: Phoenix, AZ
2014 Ghibli S Q4 & 2008 C350
Im not necessarily talking about us diagnosing the problem, but sharing experiences. Thats what forums are for right?
If someone else has had this problem before & found out how to fix it, that is good information to take to the dealer to say "I have heard that people with this problem have had it fixed by replacing the _______".
If someone else has had this problem before & found out how to fix it, that is good information to take to the dealer to say "I have heard that people with this problem have had it fixed by replacing the _______".
Member
Joined: Jan 2008
Posts: 131
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From: Cortlandt MAnor and Yonkers
08 C350, mars Red, Pano, PII, M.Media, Ipod. 18" AMG rims
Ive got a problem with my 2 mth old C. Its never happened before, but just today when i got home and left it in Park, the engine decides to start revving, and it revs like how you would stomp on the pedal and let it go, stomp on it and let it go....as if it is getting ready to sprint off from start at a drag race.
Anyone had this problem?? and do you know why?? im going to bring it to the dealer but just wanted to know if anyone had this problem...
Anyone had this problem?? and do you know why?? im going to bring it to the dealer but just wanted to know if anyone had this problem...
Thread Starter
Newbie
Joined: May 2008
Posts: 5
Likes: 0
C300
Thanks a bunch guys for the replies. No offence to anyone but yeah i was hoping it was a known problem so i'd know i wont be jerked arnd by the dealers. Got it down to the dealers today so i hope i wont be stuck without it for toooooo long....
LOL, sorry couldn't resist. Please let us know what you find.
Thread Starter
Newbie
Joined: May 2008
Posts: 5
Likes: 0
C300
Yeah i must have missed the "R" after the "S" mode...
Anyways got my ride back today....spot one "Red Demon08".....it was the airmass sensor that was causing the revs.....got that switch out to a new one and it seems fine now....The guy at the dealers didnt really know how to explain the reason for the perculiar behavior but he said that it was the massair sensor that messed up the throttle....so as long as everythings fine, im happy now....
Anyways got my ride back today....spot one "Red Demon08".....it was the airmass sensor that was causing the revs.....got that switch out to a new one and it seems fine now....The guy at the dealers didnt really know how to explain the reason for the perculiar behavior but he said that it was the massair sensor that messed up the throttle....so as long as everythings fine, im happy now....
