I has some difficulties with my navigation/command system for my 2001 Mercedes. With a scan, the mechanics at Hardin Brothers were able to repair and reset this system. The cost was probably less than half of what it would have been at a Mercedes dealership and this also saved me a one hour drive to downtown. I am very appreciative for the quick service at a reasonable price. I was also given some advice how not to trip off this system in the future.