I've got a facelift C63 mapped by MSL. Not often but occasionally I'll engage LC by doing the following. Sport handling mode on Click paddle Turn selector to RS Confirm with up paddle Apply brake and accelerate, this is where it goes wrong. The car will go into LC mode and revs will flat between 3.5-4K rpm. When I let off the brake the car makes a beeping noise and car doesn't launch.. any ideas what could be casing this?