Here is a New Genuine Mercedes-Benz Engine Coolant Level Sensor Sender for Models: R129, W202,  and W140.
MB Part#  1295450224
Made in Germany

It has been stored in the Bag since new.

Fitment
It might fit the years and models listed above but I can not guarantee it so please compare part#'s and research it for yourself before buying.  
It is the buyers responsibility to check interchange years and match part #'s before buying.

This is part of a large lot of parts that was acquired from a service station.

Sold as is.  No returns unless the part is not as described and pictured.