I took my 6 coupe to Anthony one month after I bought it used with 25K. While I was impressed with the handling and the awesome speed, I never knew the cars full potential until Anthony and his brothers started correcting all the engineering and design flaws that came from the factory. He has reduced heat sink with phenolic spacers that go between the intake and the block, increased HE size by 200%, increased coolant flow by 75%, and his flash tune is instant gratification. He is definatley on this forum, and I'm sure he can work your SLK320, you will be happy with his work and commitment to service. I am.