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 S500
Average mileage: 82,333 (54,000–118,000)
9 people reported this problem
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The shop replace the electrical connector and the car is leaking again. They are still trying to figure this out.
This was a $15 rubber grommet. My indy shop did not even charge labor, they said it was so easy. It caused me no performance problems or other damage, but I did get it fixed within days of noticing a drip in the driveway. I've gone almost 40,000 miles since with no problems.