I just saw this post.. Yes , there is a little tool that I bought on Ebay years back.. It's made by ATE it's for Mercedes Benz W211 and R230.. for the years for '03 & '04 models only.. You plug it into the OBDII connector and then you follow the instruction manual.. The manual it's self is in 7 languages.. D, GB, F, I, E, CZ, & PL.. The tool is 3" x 1" and it works beautiful.. It's handy too.. The tool says ATE SBS on it with model #03.9301-0400.4 and stock # 760129..