The button Benzmac is referring to is the 0 (zero) button. This procedure worked in my 1998 E300, but it might be different in yours. Look it up in your manual under FSS (Flexible service system)

Paul


I had some trouble finding this thread, so I'll throw in some keywords:

reset wrench light
reset maintenance required light
reset oil change light
reset service required light

__________________
1998 E300D 1-tank Elsbett Veggie system
1986 190D 2-tank Veggie system -Sold