I have a 1991 500SL with 79K miles, I want to replace the shocks and thinking about some mods to increase performance. I lost to a VW R32 GTI [ouch! I hope it had a lot of mods]. I am reluctant to have an indy shop work on it, all service is done at the dealer including oil changes. After market parts make me a bit uneasy. Any suggestions? Any thing from AMG, Brabus etc that might help? Anyone use an indy shop in the Washington DC area or within 100 miles?