I have replaced the battery and alternator in last few days and have a minor problem, please help. The ABS system light is staying on and the tachometer quit working at the same time, any suggestions, have checked all the fuses I can find even the two behind the main fuse box, must be missing one somwhere? This is my second Mercedes diesel car the first was a 240, bougth it new in 1976, drove it about 290,000 miles in 11 yrs. , only replaced clutch plate bearing, one battery, and one set of shocks, what a great car. The car I am driving now, 1987, has about 265,000 miles and runs like a Swiss watch. It has great paint, sky metalic blue, cream interior, extra folding rear seat that my grandkids love. I hope to drive this a long time. Don't have a picture yet.

 

check the wheel speed sensor.