Hello,

I have the LET HE an Johnson CM30 on my SLK32 for a few months now . It fits with some minor modification on our baby and works very well. Code3 Pulley together with 178mm is much "bigger" than 185mm crank pulley. In my opinion it is too much. A good ECU-tune can be very helpful but keep in mind, that sometimes a tune "feels" 30-40 rwhp and the power gains at the top / under full load aren't that much... Keep up the good work on your car...