The First Generation Mercedes M-Class (now the GLE-Class) was designed to be a luxury midsize SUV that could fit in the market niches between the GLK Class and the GL Class. It was also intended for the M-Class to replace the 11 year-old G Class, and with its spectacularly high marks in insurance industry crash tests and its unique sales platform (including appearances in Jurassic Park: The Lost World) it quickly became a massive sales success in both the U.S. and Mexico. The following are a few of the more prominent issues that owners experience with the W163:
Rust Issues: Rust problems in the wheel arches and door sills have been reported by owners of the W163. With regular inspections and rust prevention measures this issue can be mitigated.
Electrical System Malfunctions: The W163 M-Class can experience occasional electrical system glitches, such as window switch malfunctions, power seat control problems and central lock failures. Address any electrical issues with an experienced Mercedes-Benz technician.
Transmission Problems: Rough engine idling has been reported and is usually accompanied by a check engine light and shakes/shudders when the car is in park during initial acceleration.
Fuel System Issues: Occasionally fuel system issues are a problem in the W163. This may present itself as a fuel leak or fuel pump failure. Regular maintenance and inspection by a qualified Mercedes-Benz repair center will help to address these issues, even before they start.
Nothing should keep you from fully enjoying the benefits of owning a Mercedes, and these issues are, if nothing else, incredibly aggravating. The best bet for solving such problems is to take your W163 to an independent German auto service center for a thorough diagnostic and repair.
Search for a local, independent Mercedes-Benz repair shop with Mercedes-Benz mechanics that have dealer-level expertise at a fraction of the expense.