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.
Transmission May Leak Fluid and Damage Control Module on Mercedes-Benz C43 AMG
6 people reported this problem
1999 Mercedes-Benz C43 AMG 50,000 mi, Visitor
Noticed transmission fluid leaking out of transmission wire connector during changing of the transmission fluid. Replaced wire connector $20. Transmission fluid must be changed at least every 50,000 miles $600.