One problem related to emission control has been reported for the 1999 Mercedes Benz M Class. The most recently reported issues are listed below.
Transmission failed, repaired four times, electrical system, battery failed, replaced, oz sensor failed replace 3 times, fuel system pump and sensor replaced, front passenger restraint system failed.
| Engine Belts And Pulleys problems | |
| Check Engine Light On problems | |
| Emission Control problems |