This relay provides the delay function on your wiper motor. If your wipers are not working in the first position on you switch it may mean this relay is bad. It is located behind your instrument cluster up close to the firewall on all late 123 chassis 1981 to 1985. On 126 300SD and 380SE it is located inside the fuse box. BRAND NEW KAE relay. Also fits late 107 380SL and 560SL.
Late 123 Early 126 Late 107 Chassis Wiper Motor Intermittent Function Power Relay