Guys I am highly considering getting my 2011 CL500 4.7L twin turbo remapped here https://www.cg-remaps.co.uk/ Other than "More BHP" in Crewe, there doesn't seem to be many tuning companies in and around south Cheshire / north Shropshire and that's why I'm looking into getting it done here. They assure me that measurements are taken before and after the software squirt via dynamometer rolling road so it seems they are going about it the right way. Their reviews seem to be very good, and their price of just £400 seems to be very reasonable indeed, with other companies asking in excess of £1000 for what seems to be the same job! Interestingly, wherever I go on the net to find potential results etc, every single company offering a remap for this model ALL give exactly the same figures. I’m guessing then that the software required to squirt into the engine ECU comes from the same supplier? Are there any obvious questions you guys would be asking before parting with your money for this upgrade? I doubt that there are many members on here that have had such an upgrade on this engine as the CL is quite a rare sight on the roads. Thanks in advance, Will.