Hello all, I wonder if anyone could help with a 'weird' and seemingly intermittent performance issue with my standard '07 W216 CL600 (~27k miles)? Normally the car is very quick, but sometimes (1/4 of the time maybe), the car is only 'quick' - not at all scientific or useful I know, but I can't describe the issue any better. It is like the car is running without any boost - the issue can occur when the car is cold, warm or hot, driving slowly, or after a spirited drive. Does anyone have any ideas? Apologies for the limp explanation. Lastly, thanks to those involved with Benz on the Green - a great day, and good luck with the cops if anyone is heading down to Le Mans this weekend - it is gonna be scorchio and a lot of fun . Many thanks all. Have a nice day. Phil.