1992 300SE W140 Speedometer Issue..... - PeachParts Mercedes-Benz Forum

BigRed0803 · #1 04-06-2011, 10:14 PM

I have a 92 300SE, I was having transmission issues so my buddy lent me his rack and I changed out my transmission with a Mercedes factory rebuild that I purchased from the dealership. Everything was fine after instullation, transmission shifted smooth as silk. I drove the car a time or two and didn't happen to see that the speedometer isn't working which in turn the odometer isn't working. I know both parts were working before the transmission swap. I got the car back on the lift today to make sure everything was hooked up properly and it was. How exactly does the speedometer work on this car? I checked fuses all seemed fine. I pulled the instrument cluster to make sure everything was hooked up properly. I hope something isn't wrong with the transmission, I spent the money for a factory rebuild so I would hopefully not have to worry about anything, then this happens. Other possibilities; faulty speedometer head, sensor at transmission? All help is appreciated.

mbdoc · #2 04-07-2011, 08:07 AM

Is the ABS light staying on?

BigRed0803 · #3 04-07-2011, 08:36 AM

As a matter of fact it is MB Doc! What does that tell you?

mbdoc · #4 04-07-2011, 09:44 AM

Blown fuse in the Base Module, located in the computer box.

BigRed0803 · #5 04-08-2011, 06:13 PM

MB Doc, your the man. Your diagnosis was exactly right. Thanks again!!!!!!

Tris135 · #6 04-10-2011, 08:03 PM

If my odometer doesn't work but my speedometer does and I have an ABS light on will the same fix you mentioned fix my problem??

BTW I have a 1994 SL320

mbdoc · #7 04-11-2011, 08:18 AM

For Tris135, No. You have a cluster problem.