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 CLK430 Wire Connector on Transmission May Leak Fluid and Damage Control Module
Mercedes-Benz CLK430 Problem
Average Mileage: 104,386 mi (44,024 mi - 137,134 mi)
Visitor, 2003 Mercedes-Benz CLK430, 44,024 mi
Just diagnosed and i'm waiting for an estimate to repair.
I was told by my mechanic that I have a transmission leak and if the fluids gets into the electrical connector. May caused major problems with a high expense.