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Old 12-14-2006, 11:54 AM
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Join Date: May 2006
Location: Pasadena, CA
Posts: 2
W202 722.6 Transmission Going into Limp Home Mode

I have a 99 C280, and its transmission seems to go into 'limp home' mode at random times, perhaps a couple of times per week. If I turn off the engine and restart, it ususally returns to normal. I have recently changed the transmission oil, but it has been happening prior to the fluid change.

A quick search on this forum revealed that it might be a 'sensor plate' that could cause this problem. Is this the correct diagnosis? How much does it cost to replace it at the dealer or a shop? Can this be a DIY? If so, what parts should I get, and what is the procedure?

Thank you in advance,

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Old 12-14-2006, 07:09 PM
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Join Date: Mar 2004
Location: new york/orange county
Posts: 639
The first step in diagnosis is fault code retrieval of all modules. Post any stored codes.
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Old 12-14-2006, 10:49 PM
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Join Date: May 2006
Location: Pasadena, CA
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The odd thing is that my mechanic told me that there are no stored codes. I'll borrow my friend's ODB-II scanner to see if there are any codes.
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Old 12-15-2006, 04:02 PM
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Join Date: Feb 2002
Location: east coast
Posts: 1,255
whenever I work on my C-classes to fix a computer or sensor issue. I always make sure my battery is 100%.
I also don't take any chances and install a new Mercedes battery every four years in my cars.

But I doubt limp home mode is activated by a weak battery on a 202.
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Old 12-15-2006, 04:11 PM
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Join Date: Feb 2004
Location: Walnut Creek, CA & 1,150 miles S of Key West
Posts: 4,874
OBDII will not pull the trans codes. You are going to need a dealer quality scanner for that.

Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)
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