PeachParts Mercedes-Benz Forum - View Single Post - Sending unit's out; how do I take it apart?

lrg · #11 01-14-2003, 11:31 PM

Piotr,
I wouldn't try to fool with the gauge unless you are absolutely certain that the gauge is the problem and even then only as a last resort. I think the sending unit is still the culprit. Sometimes they are just beyond repair. It sounds like you cleaned it pretty throughly but did you get the contacts on the float itself? Also be sure you don't have a hole in the float. If it sinks it will read empty. Try removing the sending unit and attach an ohm meter to the gauge contacts and see if the resistance changes evenly as you move the float up and down. If you have even a little bit of black algae crud in there it can screw it up.