I finally replaced the sending unit with a new one and that fixed the problem.

If anyone has an interest in the old sending unit, send me a private message. It is 5 years old and it shows the fuel level just fine, but as previously mentioned, the low fuel warning light stays on very dimly. That is better than not showing the fuel level. It might only need a better cleaning job than I was able to do with the Gumout spray.

__________________
- Jeff

1957 W121 190 (history)
1966 W108 250S
1967 W108 250S (parts)
1982 W123 240D (history)
1989 W124 260E