W116, BENZ AID - COMMON QUESTIONS AND ANSWERS

Fits 280SL 280SE 280SEL 300SEL 450SE 450SL 300SD 220D 240D 300D 300CD 300TD 300SD 380SL 560SL 420SEL 560SEL 300SDL 300SE 350SD 350SDL

For use of 17mm injector line nuts only: We include 5 free silicone caps to protect your injection pump

There is one nut that is very hard to get to without this wrench

UPDATE: 6/25/25. NEW design. Does not require adjustment. Allows you to use our brake bleeder tank to also pressure test the cooling system on most models 1973 to 1995 ( see design of metal cap to confirm )