afternoon all, SL55 AMG, keyless card unlocks & locks both doors from the passenger side, keyless card unlocks both doors from the drivers side but does NOT lock the drivers door (but does lock the passenger door) anybody know what the problem is & remedy? The keyfobs do lock/unlock both doors from both sides of the car. The reason why I ask this, is on other threads everybody says "get new handle as there can be some problems with water ingress etc" so I asked my non-MB dealer to get a new handle, he refused as he says he spoke to MB & they said "the problem could be anything!, so don't buy a new handle" so I'm stuck! I'm thinking of buying a handle myself! Also, I'm thinking of upgrading the engine, suspension, supercharger, how do I find which model mine is? eg W220/R230? Thanks for all your help.