Problem Description and Possible Solution
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.
Average mileage: 94,129 (19,000–200,000)
63 people reported this problem
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.
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.
not fixed yet car stuck in garage in second gear
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.
Will not change past first gear
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.
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.
The Transmission problem cost me $440.00 for parts @ me and a friend did the work but!@I mean but! the dealer(only had to reboot the transmission computer) that cost another$400.00 what a joke! and now this" I'm thinking hard about going back to Honda for real.! P.S. S DON'T EVER BUY ICAR IN STOCKTON,CA AT TOYOTA ,BAD BAD BAD THEY WILL LIE TO YOU, AND STEAL YOUR MONEY WARRANTY COMPANY IS A JOKE THEY WILL NOT HONOR THE WARRANTY THIS IS THE TRUTH THATS WHY IM HERE WARNING YOU.
transmission missed oil,no computer report,no way to check oil;cooling liquid went into the transmission resulting in a 3000$ transmission rebuilt; all valves were burned;
Mercedes has a service campaign recall for this for certain model year C230. Mine was under the service campaign and the dealer had a cover placed on the solenoid. Take your cars in to see if your car is applicable. If not, it is recommended to have the work done either way.
Same happen and damaged the temp control in the transmission.
Transmission oil started leaking from the harness plug.
I got a new plug from rockauto.com for $15 and fixed it myself in an hour.
It required me to crawl under the car but it was relatively easy.
electrical connector was leaking. Got a new one and now the transmission is completely broke
Transmission fluid leak, Trans either not engauging or first and reverse only. Added fluid(Guessed at how much to add, no dipstick ). Now will be second time that connector has been changed. Also have several problems listed on this site. Interior fabric and plastics hanging and/or cracked and separating, squeaking brakes, Bushings/Grommets cracking or comming apart: Sounds like frontend falling apart when you hit a small bump and God help you if its a speed bump at 10 mph. HVAC system smells like RTV silicon. Clicking noise from under dash/center console area will drive you insane. Sunroof inop due to stripped plastic gear on window motor, Dealer wants $2,800 to fix. CD player is inop for the second time, that was $500.00 first time. Had complete electrical system failure several times while driving at night only thing that worked was the engine (beggers cant be chosers). The best part is people think that Im above them because I drive a Mercedes Benz, GO FIGURE
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
The auto hasn't been repaired yet, after driving awhile it want come out of first gear.
Car has 56,000 miles
Starting pouring out when I filled it with transmission fluid real fast check gasket but it was good leak was from top
Occasionally would go into limp mode but reset if I turned the car off and back on, until this last time it would not reset. Had diagnostics done (but knew from reading pretty much what it was) and they say it's the transmission speed sensor. The sensor only can't be replaced so it's the entire valve body costing $2k. This is a foreign auto repair shop not a Mercedes. I've read the culprit is often leakage from WIRING HYDRO-ELECTRIC PLUG FITTING and people have even repaired this themselves for little cost.
was told I needed an m.e modual that's 1500.00
Engine misfiring at startup.