theo_mayer9

Mercedes V Klasse Automatic Transmission Problem

My 2005 Mercedes V Klasse diesel with 251640 km is having transmission issues. The automatic transmission isn't shifting right, the indicator light is on sometimes, and it feels like it's slipping. It even went into emergency mode once. Could this be the transmission oil?

4 comment(s)

That sounds familiar. I had similar transmission problems with my V Klasse. The slipping and emergency mode are concerning. Have you checked the voltage?

Undervoltage? I hadn't considered that. How does undervoltage affect the automatic transmission? Can I check that myself, or is it a workshop job?

Low voltage was the problem for me. The transmission needs stable electrical signals. When the voltage drops, the control unit might get bad data, causing shifting problems. I'd suggest a workshop check the electrical system and the transmission oil. It's hard to diagnose without the right equipment.

Thanks for the tip. The workshop confirmed it was undervoltage and the transmission oil was worn. They replaced the oil and fixed the voltage. It cost 240€ and shifts smoothly now.

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