1989 190 2.6 doesn't read, what area should I start at? All other gauges are working fine.

Fuel gauge sending unit.

it your could be instrument cluster too. to test the sending unit you can use a special tool or simply remove it and measure the resistance of when its full and empty and see how it compares to spec.

__________________
1986 300SDL, 211K,Dealership serviced its whole life
1991 190E 2.6(120k)
1983 300D(300k)
1977 300D(211k)

Unplug sending unit and jumper from Bu/Blk wire to Br wire..
Key ON....... gauge should read Full.
If NO, gauge circuit is at fault ..if Yes, sender unit is at fault.

Test for Reserve lamp is jumper Bu/Grn and Br at same plug w/key ON......Reserve lamp should light.

__________________
A Dalton

Thanks everone for the quick reply's

__________________
Mark Harnden