The electrical connector at the automatic transmission may leak fluid. Over time leaking fluid could migrate through the wiring harness and damage the transmission control module. If that happens a new harness and control module may be necessary to correct the problem.Google+
Car Problem Reports
Mercedes-Benz C230 Wire Connector on Transmission May Leak Fluid and Damage Control Module
Mercedes-Benz C230 Problem
Average Mileage: 83,497 mi (36,300 mi - 183,000 mi)
Visitor, 2000 Mercedes-Benz C230, 172,000 mi
CAR HAS BEEN IN LIMP MODE FOR MONTHS....DID SOME READING AND FOUND THIS WIRING HYDRO-ELECTRIC PLUG FITTING TO BE THE CULPRIT. iTS A CHEAP AND EASY FIX. I GOT A GERMAN REPLACEMENT PART FROM CARQUEST AUTO PARTS. ALSO, BOUGHT ELECTRIC CONTACT CLEANER FROM RADIO SHACK. YOU WILL NEED A 7MM SOCKET WRENCH TO REMOVE THIS PART. THE CONNECTOR US ON THE FRONT PASSENGER SIDE OF THE TRANSMISSION. THE WIRES ARE REMOVED BY PULLING A SMALL LEVER- WHITE-YELLOW PASTIC LEVER DOWN FROM LIKE 11:00 TO ABOUT 6:30 (COUNTERCLOCKWISE PULL) YOU NNED A SMALL 7MM SOCKET TO REMOVE THE FAILED FITTING.
WHEN YOU PULL THE WIRES OUT OF THE HOLDER- BEWARE OIL WILL COME OUT FAST - SO HAVE YOUR NEW PART READY TO PUT IN.
DO MAKE SURE 2 ORANGE O-RINGS COME OUT WITH THE OLD PART ALSO. GOOD LUCK- ITS A VERY EASY FIX. YOU CSN DO IT.
IT SEEMS LIKE BULLSHIT THAT TRANS OIL COULD TRAVEL THRU THE WIRES INTO THE TRANSMISSION CONTROL UNIT, BUT ITS BEEN REPORTED. THE TRANSMISSION CONTROL UNIT IS LOCATED BEHIND THE PANEL ON THE PASSENGER'S FEET AREA.
Visitor, 2004 Mercedes-Benz C230, 38,000 mi
I had this problem on my 2004 C320 2dr sport coupe. Instead of replacing everything and charging me $1750. They dried out and cleaned the harness and module. Everything seems o.k.
Visitor, 2003 Mercedes-Benz C230, 66,000 mi
i have a 03 c230 sports and only 66000 miles on it and the trans is slipping and makes a humming nose when u turn on the car or try to drive it dont no if trans need to be rebuilt.
Visitor, 2000 Mercedes-Benz C230, 59,500 mi
Car would get stuck in park from time to time. Limp home mode activated a few time.
Faulty gear selector lever module and transmission plug. Both replaced.
Visitor, 2005 Mercedes-Benz C230, 58,000 mi
The wire connector started leaking transmission fluid and by the time it only got worse.
I purchased a new connector from Rockauto.com for $15 and replaced the ailing one myself in an hour.
Visitor, 2006 Mercedes-Benz C230, 44,000 mi
not fixed yet car stuck in garage in second gear
Went to dealer in Smithtown yesterday to have trunk latch fixed. Told me that transmnission fluid is leaking from conductor and I need a new pilot bushing and the harness cleaned at a cost of around $900. Am debating whether to see a transmission place
Visitor, 2003 Mercedes-Benz C230, 183,000 mi
transmission missed oil,no computer report,no way to check oil;cooling liquid went into the transmission resulting in a 3000$ transmission rebuilt; all valves were burned;
Visitor, 2006 Mercedes-Benz C230
Same happen and damaged the temp control in the transmission.
tranny control module ruined by fluid wicking up the wire harness from leaking tranny plug adapter