HI All, I have fitted a big 220 mm crank pulley and 4 bar fuel PR TO my 98 230slk. all the tuners seem to tune through obd2 port. whereas with ME2.0 chip removal is needed. Speer are the only people i have found who will work on this and i have to remove chip and apparently they send a replacement. Anyone done this. MY car is running fine and produces max 8psi. . I Have smaller s/charger pulley i could fit as well to produce a bit more power but boost seems limited as ecu restrict boost..it seems! I have thought about clamping maf with 4.7 v zener but i am not sure if this is the only restriction. Anyone have any thoughts.