The fuel gauge, water temp gauge and tach suddenly stopped
working while I was driving. I bought two manuals on ebay that
didn't help - neither had the correct wiring diagram. Does anyone
know where to start? Where is the instument panel grounded?
Where is the tachometer sensor? Thanks.

Curt

Does your fan blower still work. I know there are some gauges on that circuit, check the fuse.

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1982 300TD 279K.
1984 190D 5sp 265K

Yes, the blower works.

the fuel/oilpreasure gauge works off the same fuse....#10 i think, it has a bridge linked to another fuse spot.
the tach is pluged in a wire that runs down thru firewall to bell housing were pickup is located.
if fuse looks good try another,get some die-electric grease in there.
also there isn't much room behind gauge cluster,may be wires vibrated off.........

fwiw
mark

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84 190D 2.2 auto on the road
85 190D 2.2 auto blown head/cas