There are 2 stored owner reports matching the powertrain & transmission leading-label group for the 2010 Mercedes-Benz GL-Class in our NHTSA-sourced dataset. These are unverified consumer reports and may not reflect confirmed defects.
This group counts stored reports whose component label starts with one of this site's matching prefixes, ignoring case. Each matching report counts once within the group. Components mentioned later in the label or only in the narrative are not searched. How component counts work
Loaded 2 of 2 matching reports.
Open the full vehicle complaint log (all categories)TRANSMISSION VALVE BODY HAS FAILED. TRANSMISSION HAS PROBLEM SHIFTING UP/DOWN AT LOWER SPEEDS (UNDER 40MPH). SHOW CONFIRMED THE VALVE BODY IS NO GOOD.
AFTER A LONG TRIP WITH THE 2010 MERCEDES GL350 BLUETEC, I NOTICED FRESH OIL ON THE GARAGE FLOOR. I TOOK THE GL350 TO A LOCAL MECHANIC FOR AN OIL CHANGE THE DAY AFTER, AND THE MECHANIC NOTED THAT THERE IS SIGNIFICANT OIL UNDER THE ENGINE. FEW DAYS AFTER, CHECK ENGINE LIGHT CAME ON, AND I TOOK THE GL350 IN FOR A CHECK, AND ANOTHER MECHANIC CONFIRMED THAT THE ENGINE OIL COOLER SEAL IS BROKEN CAUSING THE OIL LEAK. IT SEEMS THAT THIS IS A VERY COMMON FAULT WITH MERCEDES OM642 ENGINE IN MY GL350.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
NHTSA source checks for this vehicle year
Checks are recorded separately for each dataset, not for the whole page. Dates use UTC. A missing check date does not mean no records exist.
Vehicle import recorded: Aug 31, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.