It's working for most of the 02+ audi, vw, bmw, mercedes, porsches. The ECU and electrical system is the same as the Mercedes or almost the same, so it should work.

If it doenst work, it just wont let me communicate with the system, so I will just do it the same old way of opening up the ECU and reprogramming the eprom chip. But there's a big chance of that it will work. I'm willing to offer a discount for the first car to try this out though, but as I said, it will most likely work as the car is almost identical to a SLK.

Gary