rbr115

I just finished installing a us model year 2000 (A208 820 38 89) in my 2001 CLK 320. unfortunately it has the old firmware. I need the part number for the later firmware update (MY 2001?) one thread lists it as W251 589 00 22 00, but that may be the part number for the European update. Does anyone know the correct correct part # for the US update?

Thanks

Rich