 Trouble in paradise! The local dealer performed the 40K mile service which included the replacement of many filters and fluids but I had to go back at a later date for the required transmission service. After spending a total of $700 for both services, the service adviser tells me the 4matic transfer case is leaking and worse yet-it is a common problem on ALL MB's with all wheel drive. Fortunately, warrantee covered what could have been a very expensive repair. This is the first problem of any sort with the car.