2008 Mercedes-Benz ML550

Do not drive

Owners filed 18 complaints about this vehicle with federal regulators, most often about the electrical system. It has been recalled 2 times.

What fails
ComponentReportsCrashesFiresInjuries
Electrical System4
000
Steering2
000
Service Brakes, Hydraulic2
000
Seat Belts2
000
Air Bags2
100
Unknown or Other1
000
Tires1
001
Suspension1
000
Fuel/Propulsion System1
000
Engine and Engine Cooling1
000

2 safety recalls

Part 573 reports
Service Brakes, Hydraulic › Power Assist › Vacuum24V298000Do not drive
Filed Apr 26, 202415,604 vehiclesMercedes-Benz Usa, Llc

Defect. Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2006-2012 ML, GL, and R-Class vehicles. Please refer to MBUSA's recall report for specific vehicle model details. Moisture may accumulate and cause corrosion in the brake booster housing unit, which can result in reduced brake performance or brake failure.

Risk. Reduced brake performance or brake failure can increase the risk of a crash.

Remedy. Owners are advised not to drive their vehicles until the remedy has been performed. Dealers will remove the rubber sleeve, inspect the brake booster, and as necessary, replace the brake booster. All repairs will be performed free of charge. Owner notification letters were mailed on May 24, 2024. Owners may contact MBUSA customer service at 1-800-367-6372. MMUSA's number for this recall is 2024050001/2. This recall is an expansion of previous recall number 22V-315.

Service Brakes, Hydraulic › Power Assist › Vacuum22V315000Do not drive
Filed May 9, 2022350,294 vehiclesMercedes-Benz Usa, Llc

Defect. Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2006-2012 ML-Class, GL-Class, and R-Class vehicles. Please refer to MBUSA's recall report for specific vehicle model details. Moisture may accumulate and cause corrosion in the brake booster housing unit, which can result in reduced brake performance or brake failure.

Risk. Reduced brake performance or brake failure can increase the risk of a crash.

Remedy. Owners are advised not to drive their vehicles until the remedy has been performed. Dealers will remove the rubber sleeve, inspect the brake booster, and as necessary, replace the brake booster. All repairs will be performed free of charge. Owner notification letters were mailed June 30, 2022. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's numbers for this recall are 2022050014, 2022050015 2022090006, & 2022090007.

What owners reported

Newest filings
Engine
Filed Aug 28, 2025PA

Engine died and won't run. Known issue with MB balance shaft that they refuse to repair or help with the cost of a $8k job. Highly disappointed.

Unknown or Other
Filed May 19, 2023CA

Unknown

Service Brakes, Hydraulic
Filed Jan 9, 2023TX

The contact owns a 2008 Mercedes-Benz ML550. The contact received notification of NHTSA Campaign Number: 22V315000 (Service Brakes, Hydraulic) however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.

Tires1 injured
Filed Sep 3, 2022TX

Cooper Tire Evolution 245/65R17 - Tire Tread Separation - the entire tread out layer came off of the driver side front tire while driving on the freeway - the tire was not deflated - the entire tread hit the driver side mirror breaking it completely off - hitting driver window and deploying all airbags on driver side of the vehicle. The tire itself still was fully aired and full circle entire outer layer of tread was off of the tire. Caused vehicle damage - Personal Injury

Service Brakes, Hydraulic
Filed May 31, 2022CO

The contact owns a 2008 Mercedes-Benz ML550. The contact received notification of NHTSA Campaign Number: 22V315000 (Service Brakes, Hydraulic) however, the part to do the recall repair was not yet available. An unknown local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.

Seat Belts
Filed Mar 7, 2022IL

Back sit the seat belt locks in place and it does not lose its locked mechanics. I have found that several people are having the same problem. here is a link to a website Video describing the problem. https://www.youtube.com/watch?v=zwZmUSWNOlk. I have found the problem is a small baring locking the belt. Please let me know if you need more info. As of now we are down to a 2 back passenger car or 3 but one without a belt - no good. I do think this qualifies as a safety issue - What if it had locked and harm one of my kids? I had lower the seat and I was not able to pull it up until I disabled the mechanics and neutralized the belt - that should not be the case - specially since many others are having the same problem. [XXX] INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).

Electrical System
Filed Jan 5, 2022PA

Safety defect rear sam acting up after rain . no lights no fuel gauge no remote no turn signal while driving almost had an accident

Electrical System
Filed Sep 12, 2021NY

My NHTSA #11431874 I have made a complaint about my back computer was damage by water where the is installed on the right side of my car now I found out that the reason my chairs are not moving is because the electrical is also damage this is so unfair the problem is not my car but the ways and place they installed the computer??

Electrical System
Filed Sep 6, 2021NY

The back computer seat on the top of the was supposed to be draining out of the car instead the water retrain in the cause damage to my the computer I complained about it but never got a solution until the water damage the and saw for the first time where was the water on back of my car this was careless why put computer on the top of water that caused the damage and problem for my car?

Fuel/Propulsion System
Filed Jul 12, 2021FL

Smells badly for gas in cabin and outside

Electrical System
Filed Mar 13, 202135 milesOH

THIS VEHICLE HAS MAJOR PROBLEM WITH REAR SAM AND SEAT NO POWER. EVER SINCE THIS ML WAS MADE 10 CAR I HAD WAS BOUGHT SAM AND NO POWER TO THE SEAT FRONT

Suspension
Filed Jun 5, 2020113,000 milesCA

SINCE I PURCHASED THE CAR, THE SUSPENSION HAS BEEN A MAJOR ISSUE. WHEN THE SUSPENSION IS FAULTY, SOMETIMES THE CAR IS STUCK DOWN- NOT ALLOWING THE CAR TO RISE SO WHENEVER I DRIVE THROUGH A SPEED BUMP, MY CAR SCRUMPS/SCRATCHES THE BUMP. I HAVE TO FIX IT TWICE OR MORE EVERY YEAR AND IT IS QUITE FRUSTRATING. I WOULD APPRECIATE INVESTIGATION INTO THIS AS THIS IS CAUSING FINANCIAL STRAIN ON ME AND MY FAMILY. *TR

Air Bags
Filed Apr 24, 2017154,000 milesCT

MY POWER STEERING PIN BROKE AND THERE WAS A RECALL ON THIS SAME EXACT THING AND MY VEHICLE WAS NOT COVERED

Steering
Filed Feb 8, 2017105,000 milesTX

NHTSA 08V682000 DEFECT IN POWER STEERING OIL PRESSURE DRIVING PIN. THE NHTSA SHOULD REEVALUATE ACCEPTING MERCEDES BENZ UNDERESTIMATING OF THE AMOUNT OF VEHICLES THAT WERE EFFECTED BY THIS RECALL. THERE ARE STILL VEHICLES THAT ARE LOOSING POWER STEERING PRESSURE DUE TO THE DRIVING PIN THAT IS USED TO CONTROL POWER STEERING OIL PRESSURE BEING DEFECTIVE AND THIS IS A MAJOR SAFETY ISSUE THAT COULD RESULT IN DEATHS AND ACCIDENTS. THE PIN BREAKS DURING NORMAL VEHICLE TURNING SO THE STEERING ASSIST WILL NO LONGER OPERATE EFFECTIVELY IT ALSO CAUSES OTHER DAMAGE TO THE VEHICLE AS A RESULT OF THE HARD STEERING DEFECT AS A RESULT OF THE PIN BREAKING. WHEN DRIVING COLD THE VEHICLE HAS POWER STEERING AVAILABLE, WHEN WARM VEHICLE LOOSES POWER STEERING, FLUID IS CIRCULATING IN POWER STEERING PUMP AND PRESSURE CHECKS FINE. AS A RESULT DUE TO HARD STEERING LEAKS DEVELOP DUE TO POWER STEERING PRESSURES VARIANCES IN THE STEERING SYSTEM OVER TIME A FIRE AND OTHER POTENTIAL PROBLEMS CAN ARISE. THERE IS ALSO A POPPING SOUND FELT IN THE STEERING WHEEL NOT DUE TO TIE RODS.

Air BagsCrash
Filed May 4, 20164,000 milesCA

TAKATA RECALL. I HAD AN AUTO COLLISION IN 2008, WHERE VEHICLE FRONT HAD TO BE REPLACED. MY INSURANCE COMPANY (AAA) PAID $40,000.00 FOR REPAIRS. THE AIRBAGS DIDN'T ACTIVATE. MAYBE I SHOULD THANK THE LORD, IT DIDN'T ACTIVATE.

Steering
Filed Aug 12, 2015MA

TL* THE CONTACT OWNS A 2008 MERCEDES BENZ ML550. WHILE DRIVING APPROXIMATELY 5 MPH, THE STEERING WHEEL BECAME DIFFICULT TO TURN AND FORCE WAS APPLIED. THE FAILURE RECURRED WHENEVER THE VEHICLE WAS IN OPERATION. THE VEHICLE WAS DIAGNOSED HOWEVER, NOT REPAIRED. THE VIN WAS NOT INCLUDED IN NHTSA CAMPAIGN NUMBER: 08V682000 (STEERING). THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS UNAVAILABLE.

Seat Belts
Filed Mar 20, 201480,000 milesMA

LEFT AND RIGHT REAR SEAT BELTS WILL NOT RETRACT.. ONCE PULLED OUT, THEY DO NOT RETRACT.. LOOKING ON MERCEDES FORUMS, THIS SEEMS LIKE A VERY COMMON SAFETY PROBLEM THAT MERCEDES FAILS TO ADDRESS.. *TR

Engine and Engine Cooling
Filed Mar 28, 201251,355 milesCT

ON TWO OCCASION WHILE THE VEHICLE WAS IN TRAFFIC/OPERATIONTHE ENGINE STALLED ON TURNING THE CAR. ENGINE HAD TO BE RESTARTED IN ORDER TO UNBLOCK THE STEERING WHEEL AND RESTART THE ENGINE. THIS IS A CERTIFIED VEHICLE AND MERCEDES BENZ CLAIMED THE INCIDENT -A DID NEVER HAPPEN AND B-COULD NOT BE DUPLICATED.

18 of 18 complaints, reproduced as filed.

Across model years

Worst on record: 2008
YearComplaintsRecallsFiresDeathsAssessment
20143300Routine
20133400Routine
20121300Routine
20116300Do not drive
20104300Do not drive
20094300Do not drive
2008 — this page18200Do not drive

Compare every ML550 year →

Reading this record

NHTSA has issued a do-not-drive warning for a recall on this vehicle.

Complaint counts track how many cars were sold and how long they have been on the road as much as they track quality. A common model from 2013 has had a decade to accumulate reports; a rare one from last year has not. The signal worth weighing is in the severity columns, in whether the same component keeps appearing, and in whether the manufacturer eventually opened a recall for it.

Recall repairs are free for as long as the recall stands. Check whether a specific car still has open work at NHTSA's VIN lookup.

Most recent recall on file: Apr 26, 2024. Source: NHTSA Office of Defects Investigation.