Answering a customer.

1992 500SEL
Engine: 119.970
Transmission: 722370 03 616680

The leaking connector is on the driver's side of the transmission, just above the pan, and the wire goes through the drive shaft tunnel into the cabin.

It is a sensor, and the ATF is seeping through the connector and weeping out at the wire connectors.

Picture attached of the offending connector.

Switch, transmission overload protector B1.
MB# 002 545 45 14

Fastlane: Switch, transmission overload protector B1.
http://catalog.peachparts.com/item.wws?sku=W0133-1603525

Seal ring
MB# 016 997 35 48

Fastlane: Seal ring
http://catalog.peachparts.com/item.wws?sku=W0133-1715476

Attached Thumbnails

   

Of course the switch isn't the problem!

The leak comes from the B1 reaction valve o-rings that is behind the switch.
The reaction valve must be removed to repair the leak.

__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator