Hi All, This is my son-in-law’s car. During normal cruising if the accelerator is suddenly pressed for overtaking the gearbox fails to change down and the car simply accelerates slowly. The kick down switch also fails to work although it has been changed twice. The fault occurs more when it has been recently used, if it is left for several days it works OK for a while. The garage (not a Mercedes dealer) appears to have no idea what is wrong. They have changed various parts costing around £1200 so far. We have lost track of what was changed. We don’t want to go to a main agent, so has anyone any idea of where to start or can someone recommend an independent in the Hemel Hempstead area please?