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 C320
Average mileage: 106,625 (48,000–179,000)
15 people reported this problem
is the control module inside the transmission or on the outside of it.
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2003 Mercedes-Benz C320 88,000 mi, Visitor
My car also gets this issue be side the cranshaft postion. Mercedes is truly a piece of expensive junk- costed us an arm and a leg to get many issues fixed..
2002 Mercedes-Benz C320 150,000 mi, Visitor
Leaking transmission fluid at the 13 pin connector part cost 33.00 on amazon.com
Transmission Control Board failure. Have minor transmission leak a year ago.
2002 Mercedes-Benz C320 75,000 mi, Visitor
Do you know of any recalls/warranties for this problem. My C320 is beginning to show some seepage.
2003 Mercedes-Benz C320 150,000 mi, Visitor
transmission not "shifting" correctly; was told it had low transmission fluid from a leak & needed a new control module & possibly damaged wire connector, estimated costs $1200 ($400 parts, $700 labor) :-(
2001 Mercedes-Benz C320 89,000 mi, Visitor
had a 2001 C320 with same trans problem. Cost $1400 for a new module. I sold the car not long after because I was tired of the repair ongoing repair expenses.