A 210 E320 sedan with SLS? I didn’t think they sold such a thing in the US but maybe this isn’t a US spec car. I didn’t think PS pump reservoirs had a level sensor like SLS combo reservoirs. I’ve never heard of a rack with a level sensor but maybe there’s a pressure sensor.

Maybe it’s a steering sensor for ASR or ESP. Are there OBD codes?

Sixto
98 E320s sedan and wagon