2009 Mercedes-Benz ML63 Problems
Owner-reported complaints filed with NHTSA, grouped by component
Data refreshed
What this page shows
Everything below is an owner-reported complaint submitted to NHTSA about the 2009 Mercedes-Benz ML63, grouped by the component NHTSA recorded on the report. These are not confirmed defects, and they are not recalls. NHTSA does not verify most reports before publishing them, and a category with more reports in it is not evidence that a part is defective.
Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.
Reports by component
Ranked by how many owner reports name each component category
- Brakes133.3%
- Engine133.3%
- Powertrain (other)133.3%
Percentages are of component mentions. A single complaint can name more than one component, so these do not sum to the total complaint count.
Each component in detail
What the reports in each category say, in the owners' own words
Brakes
Reports naming service brakes, the antilock braking system, brake hoses, master cylinders or the parking brake.
From owner reports, verbatim
LOSS OF ALL BRAKES DIAGNOSE CORRODED/RUSTED BRAKE PIPE AT CENTER LEFT OF VEHICLE
Too few reports in this category for a page of its own — they appear in the full complaint list.
Engine
Reports naming the engine itself — including stalling, misfires, oil consumption, cooling and internal engine components.
From owner reports, verbatim
WHILE MY WIFE WAS DRIVING OUR 2009 MERCEDES BENZ ML63, AT APPROX 65 MPH, ON THE 101 LOOP IN SCOTTSDALE AZ, SHE EXPERIENCED COMPLETE ENGINE FAILURE. THE ENGINE COMPLETELY SHUT DOWN ON HER. SHE LUCKILY WAS ABLE TO COAST OVER TWO LANES TO HER RIGHT TO AN EXIT RAMP. THE CAR CAME TO REST AT THE BOTTOM OF THE RAMP W/ NO ENGINE POWER WHATSOEVER. MY WIFE WAS PETRIFIED. THE CAR WAS TOWED FIRST TO AAA AND THEN TO SCHUMACHER EUROPEAN, LTD (A MERCEDES-BENZ DEALERSHIP) IN PHOENIX, AZ. ACCORDING TO SCHUMACHER EUROPEAN, LTD THE CAUSE OF THE ENGINE FAILURE WAS A BLOWN HEAD GASKET DUE TO BROKEN HEAD BOLTS. THE REPAIR ESTIMATE WE RECEIVED FROM SCHUMACHER WAS BETWEEN $6,000 - $25,000 DEPENDING ON THE AMOUNT OF DAMAGE DONE TO THE ENGINE. MERCEDES-BENZ USA HAS HAD A KNOWN ISSUE W/ DEFECTIVE HEAD BOLTS. THEY ISSUED TECHNICAL SERVICE BULLETINS BACK IN 2011 ADDRESSING THE ISSUE. ALSO IN 2011 A CLASS ACTION LAWSUIT WAS BROUGHT AGAINST MERCEDES-BENZ USA CLAIMING THEY WERE AWARE OF FAULTY ENGINE DEFECTS, AND WERE DOING NOTHING ABOUT THEM TO PROTECT CONSUMERS. MY WIFE & I WERE COMPLETELY UNAWARE THAT OUR SUV HAD AN ISSUE W/ DEFECTIVE HEAD BOLTS. AND WHEN THESE DEFECTIVE HEAD BOLTS BREAK, NOT ONLY CAN THEY CAUSE CATASTROPHIC ENGINE DAMAGE BUT THEY CAN CAUSE A MAJOR PUBLIC SAFETY PROBLEM. WE THOUGHT WE OWNED A SAFE CAR. BUT THE TRUTH IS OUR SAFETY, AS WELL AS THE SAFETY OF OUR DAUGHTER (NOW 5 YRS OLD), HAS BEEN IN JEOPARDY SINCE WE STARTED DRIVING THIS SUV. HOW MANY OTHER MERCEDES-BENZ DRIVERS ARE DRIVING AROUND THIS COUNTRY IN CARS & SUV'S THEY THINK ARE SAFE BUT ACTUALLY HAVE DEFECTIVE ENGINES THAT CAN FAIL AT ANY TIME? ALSO TO NOTE: MERCEDES-BENZ USA HAS AN F RATING AT THE BBB.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Powertrain (other)
Powertrain reports that are not specifically the engine or transmission — driveshafts, axles, transfer cases and differentials.
From owner reports, verbatim
VEHICLE IN MOTION ON FREEWAY, LOST POWER AND SEVERAL CARS RAN OFF THE ROAD TO AVOID MY VEHICLE AS IT SUDDENLY LOST POWER AND SLOWED DOWN WITHOUT WARNING. VEHICLE SAT AND COULD NOT BE DRIVEN FASTER THEN 25 MILES AS IT WAS STUCK IN LIMP MODE (UNABLE TO GET OUT OF FIRST GEAR). A CODE DISPLAYED SHOWING THE TRANSMISSION CONTROL MODULE HAD FAILED. AN INTERNET SEARCH FOUND THOUSANDS OF OTHER PEOPLE HAVE HAD THE SAME PROBLEM AND THE TCM ON MERCEDES ARE KNOWN TO ALL GO FAULTY AFTER WARRANTY HAS EXPIRED. MBENZ IS EXTORTING MONEY OUT OF PEOPLE FOR A PRODUCT THAT CLEARLY NEEDS TO BE RECALLED. THEY QUOTE 6 HOURS TO REMOVE AND REPLACE THIS COMPONANT BUT THE ACTUAL TIME TO REMOVE AND REPLACE IS 1.5 HRS PLUS 1 HOUR FOR REPROGRAMMING THE TCM. THIS IS FRAUDULENT AND UNETHICAL AND THIS COMPANY SHOULD BE DEALT WITH ACCORDING TO THE FAIR TRADE LAWS THAT PROTECT CONSUMERS.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers.
Elsewhere on this vehicle
Data sources
- NHTSA Office of Defects Investigation — owner-reported complaints and the components recorded on them
Data on this page last refreshed .