So glad I found this. I put fuel system cleaner in my tank a few days ago, for the first time since I've owned the car. Well last night, when my tank got to 1/4 full, the needle started bouncing around. I assume that the fuel treatment loosened up some gunk and now it's affected my sender. I will need to take it apart and check it.

Now I need to see if I can find a write-up like this for my 450sl.

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2000 SL500 - daily driver
1993 400E - project
1981 300D - sold
1982 300TD - sold
1979 450SL - sold
1977 450SL - sold