I am looking to get some more power and responsiveness from the car. I also have XJR and XKR (both 4.2 SC) and I feel that the 5.0L in the Merc, whilst not matching the other two should be closer in performance. Bearing this in mind does anyone on here have any experience of remapping Mercs in Derbyshire / surrounding areas generally and specifically any experience on rempapping the SL500. I used to own a BMW 6 series and has a remap done in by Custom Tuning in Bradford, which was ok. I have just called ECU Flash in Doncaster, who will do a remap, but no rolling road - which is something I would prefer. Thanks for any advice.