4MATIC, as we know it, came on the market with the 1998 model year on the E-Class and M-Class SUV. In the past 20 years, 4MATIC has become an option on every vehicle Mercedes-Benz sells. The current generation of the 4MATIC system is mechanically bulletproof. But, what can go wrong are the electronics that manage the system, and the seals that keep the fluids inside the transfer case and differentials.
4MATIC is constantly evolving. Here are some of the most common issues with it.
Andrew Markel discusses all-wheel drive vehicles, and the items that should be inspected as part of a recurring maintenance regimen. Sponsored by Auto Value and Bumper to Bumper.
On the models listed, the all-wheel-drive does not work or the EPC warning light is illuminated. The technician will find there is an internal leak in the hydraulic pump.
One of the first problems we saw in Volvo’s early cars was a failure of the coupling sleeve between the transmission and the angle gear, which sends power to the rear wheel, says Import Specialist Contributor Bob Howlett, who takes a look at Volvo AWD with Active On Demand units.