Sounds more like the motor that drives the speedo. INTERNAL fault, most likely requires repair OR replacement.

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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

I guess I have no choice but to send it into one of those shops. I looked at it carefully and soldering joints all look good. I just hate it though not to be able to fix it myself....

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Henry Bofinger
1989 560 SEL (black/black)
2001 Audi TT Roadster (silver/grey)

OK I just took it apart and redid some solder joints. Put it back into the car, and I know I did not break anything, because it worked. The question now is if it will hold up, since the problem is intermittent.

__________________
Henry Bofinger
1989 560 SEL (black/black)
2001 Audi TT Roadster (silver/grey)