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· Registered
1,510 Posts
The 38-pin connector and the OBD plug have been discussed and discussed.
On any W140, regardless of the year, the only way to do proper diagnostic is via the 38-pin connector in the engine bay. Period. If a garage is telling you otherwise, run away.

Also, of all tools available, only, HHTwin, the proprietary MB software that is part of Star SDS will let you see everything.

MAVA who is forum admin here used to say: Pay-to-play
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