I've had a total of eight Mercedes and currently have three. Other than two A/C issues with the W140, I've had almost no problem with any of them. The biggest disappointment of the lot of them has been the OEM navigation in the W220. I've had a lot of experience with GPS in airplanes, boats and cars. The OEM Mercedes system is by far the worst I've ever seen. The sad part is that it is a database problem and that is easily fixable if Mercedes would just demand a good database from Navteq. This would be an unacceptable system for a Kia , let alone a Mercedes.
