I read a profile on this shop called ES Technical Roadsport (located in So. Cal.) in a recent issue of European Car. This issue featured an Opera Design CLK320 with re-programmed ECU by ES Technical. I called ES today to get more info about the ECU for my E320, since it shared the same engine as the CLK320. They claimed that it boosts 20-25hp with the re-program and they have done many CLK320 and E320 without any problems. As I am not very technical, I wonder if one of you more technically inclined people can call ES and ask them some serious technical questions about re-programing ECU's to check if they in fact know what they are talking about. I would hate to take my car to someone that don't know what they are doing. ES Technical's # is (310) 891-1985

Thanks,

Kai