I put a 1994 E420 (124.034) gas tank and sending unit into a 1986 200E (124.020), and the gas gauge doesn't work. It shows half tank most of the time.

Before I did this the 200E gas gauge was usually wrong, but I threw the whole tank and sending unit in the trash.

Any ideas if the pickups on the instrument cluster are the same, as in read the same Ohm loads for both sending units? Are they the same or different?

__________________
Current Stable:
1994 S500 v140, 210k miles, white with grey.

Former Mercedes in the Stable:
1983 300CD Turbo diesel 515k mi sold (rumor has it, that it has 750k miles on it now)
1984 300CD Turbo Diesel 150 k mi sold
1982 300D Turbo Diesel 225 sold
1987 300D Turbo Diesel 255k mi sold
1988 300 CE AMG Hammer 15k mi sold
1986 "300E" Amg Hammer 88k mi sold (it was really a 200, not even an E (124.020)
1992 500E 156k mi sold
etc.