No not the 38 pin connector in the engine compartment. There is another unit, the OBDll Diagnostic Module that processes the signals for the OBDll connector. Both Mercedes service manuals and Alldata show procedures for testing at that point to diagnose specific DTC's with automotive type multimeter. Lots of valuable tests are shown with nominal range values and suggested actions. The connector is designated as N59/1.

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Martineau Gauda
mgauda@sprintmail.com

96 C280 Mercedes
82 Rolls Royce Silver Spur