Transmission May Leak Fluid and Damage Control Module on Mercedes-Benz S600

The electrical connector at the automatic transmission may leak fluid into the wiring harness. If not repaired, the oil will migrate through the wiring harness and damage the transmission control module. At that point, a new harness and control module may be necessary to correct this problem.

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Average mileage: 107,500 (103,000–112,000)
12 model years affected: 1998, 1999, 2001, 2002, more2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
16 people reported this problem
3 people shared problem details
My transmission conductor plate had this exact problem. I bought the car at 100,000 miles and after noticing the transmission clunking into certain gears and it getting stuck in a certain gear after rapid acceleration, I took it to the shop and it turns out that the gasket sealing the transmission had gone bad and fluid leaked onto the conductor plate and caused it to start to malfunction. The dealership quoted $2040 to fix it. I had another high end foreign car mechanic shop fix it for around $700.
Replaced gasket, conector, cleaned TCU with electric cleaner
This problem happened three times. The transmission control unit filled with fluid from leaking ETC connector. The Solution: They replaced control unit, locking pin, ETC connector plug, pilot bushing, trans.fluid
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