Very common wear / failure item on the 123 chassis. Combination turn signal, high beam and wiper switch assembly. These do not last forever. Please note that the cruise control lever is not included. You will use that from your old unit. No instructions but easy and straightforward to install. Fits all 240D, 300D, 300CD, 300TD, and 280E 280CE from 1978 to 1985.
Early 1977 models are different and are not available new.