05 c230k sedan replace transmission




I had the exact same problem once, also at a high mileage (~180k km). Turns out it was a leaky pilot bushing. Fluid was getting through the o-rings and up the wiring and making the TCU do weird things, including randomly dropping out of gear. Be sure to get the latest version of the bushing.
After that's been done, you want to clean the TCU and wiring to get rid of excess oil.
Last edited by slammer111; Aug 1, 2022 at 06:38 AM.
I had the exact same problem once, also at a high mileage (~180k km). Turns out it was a leaky pilot bushing. Fluid was getting through the o-rings and up the wiring and making the TCU do weird things, including randomly dropping out of gear. Be sure to get the latest version of the bushing.
After that's been done, you want to clean the TCU and wiring to get rid of excess oil.






