I know this has probably been asked before, but I can't seem to find a definitive answer. I've just leased an A200d AMG Line Auto 136bhp with 300nM torque and was wondering what my options are in terms of remap. obviously I don't want to void my warranty, but what are my options, and what are the potential performance gains. I've been looking into chip tuning, are they are equal ? - and are they undetectable if removed before going into the dealer ? Quantum say they can remap the car to 214bhp and 420nM torque, which sounds insane So to put it quite simply, what are my options, what are the gains, and whats the safest bet. Thanks.