Navigational (global Positioning System) Gps Problems of Mercedes Benz ML320

Years ago, while driving through new mexico, my dash and command center flashed off and rebooted. It was a little concerning because we were using the gps exclusively for our directions. There was also a transmission warning light that came on warning us to get to the nearest dealer, without shifting gears. This happened perhaps 10-15 times until I was able to detour to the mb dealer in albuquerque - absolutely wonderful people. They told me that it would sound strange but the problem was caused by a faulty glow plug sensor or module - which they didn't have in stock. Since our destination was l. A. , they called ahead to mb of beverly hills (bh), (also wonderful people) to check if they had one. They (mb of bh) couldn't find any other trouble codes except a few power spikes so they replaced the alternator, under warranty. They even rushed it due to a family emergency back home. It happened on the way back several times, then didn't happen again until I drove to colorado in 2013. It happened repeatedly while there. I called the mb dealer in denver who was supposed to have the service department call me back - they never did. I wonder if it has something to do with a change in altitude or lower humidity (electrostatic discharges)- perhaps extended driving as I drove 1,200 + miles to CO in 20 hours stopping only twice for fuel and once for a hotel. Any ideas folks?.

See all problems of the 2007 Mercedes Benz ML320 🔎.