2008 Mercedes-Benz R350 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 2008 Mercedes-Benz R350, 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
- Suspension1226.1%
- Steering1021.7%
- Brakes613.0%
- Electrical510.9%
- Engine510.9%
- Airbags24.3%
- Transmission12.2%
- Driver assistance12.2%
- Fuel system12.2%
- Interior & seats12.2%
- Exterior lighting12.2%
- Seat belts12.2%
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
Suspension
Reports naming suspension components — springs, struts, shocks, control arms and related hardware.
From owner reports, verbatim
I DROVE TO WORK WITH NO PROBLEMS. HOWEVER; RETURNING I STARTED CAR AND COULD HEAR A SLIGHT SOUND. I IMMEDIATELY NOTICED THAT THE CAR RISING SIGN WAS ILLUMINATED AND I WAITED FOR CAR TO RISE. THE CAR FAILED TO RISE AND WAS SITTING SO LOW TO TIRES THAT I COULD NOT DRIVE AND HAD TO BE TOWED HOME. AT HOME I TRIED AGAIN TO SEE IF CAR WOULD RISE AND AGAIN IT FAILED. IN ADDITION TO THE ABS BREAK SIGN BEING ILLUMINATED AS WELL. THE MESSAGE ON DASH STATED TO CONTACT DEALERSHIP FOR SERVICE. MY MILEAGE IS AT132,051.
I SEE I HAVE RECALLS FOR THE BACK HATCH DOOR AND SOME SUSPENSION RECALLS ELECTRICAL ALSO AIR RISING SYSTEM FOR A 2008 ARE 350 MERCEDES I CALL THE SYRACUSE NEW YORK DEALER AND THEY SAID IT IS NOT UP FOR RECALLS BUT THIS IS HOW I FOUND OUT IT WAS UP FOR RECALLS. *TR
Steering
Reports naming the steering system — racks, columns, power-steering assist and steering linkage.
From owner reports, verbatim
TL* THE CONTACT OWNS A 2008 MERCEDES-BENZ R350V2. THE CONTACT STATED THAT THE AUTOMATIC LEVELING BECAME DEFECTIVE WHILE TRAVELING 30 MPH. IN ADDITION, THE LEVELING WARNING INDICATOR ILLUMINATED AND THE VEHICLE BECAME DIFFICULT TO STEER. THE DEALER HAD NOT BEEN NOTIFIED OF THE FAILURE. THE MANUFACTURER WAS NOTIFIED. THE CONTACT ASSOCIATED THE FAILURE WITH NHTSA CAMPAIGN NUMBER: 08V682000 (STEERING). THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 54,000.
DROVE CAR TO A STORE IN CITY AND IT WORKED FINE, CAME BACK OUTSIDE TO START THE CAR AND IT BECAME HARD TO MOVE THE STEERING WHEEL TO THE LEFT OR RIGHT. TOOK CAR TO A DEALERSHIP AND THEY SAID IT WAS THE POWER STEERING, HYDRAULICS, RACK AND PINION AND RESERVOIR (HAD THE SAME SYMPTOMS OF A RECALL FROM 2008 FOR THE SAME MAKE AND VEHICLE). NHTSA CAMPAIGN NO. 08V682000
Brakes
Reports naming service brakes, the antilock braking system, brake hoses, master cylinders or the parking brake.
From owner reports, verbatim
The brake fluid lines are corroding much faster than in other models, and without actual corrosion under the car. It happened to my car, and I have been reading forums of MB owners of this same R model, as well as C, E, GLK, and ML models all reporting the same issues. The lines corroding earlier to due to the brake boost system failure and other fluids/air entering the system is the most consistent cause of brake line failure I was able to get off the internet, as well as MB not using lines with proper material. The only thing I know is that the lines are not supposed to fail this early and this bad. It happened while driving north on [XXX] in NY INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
The contact owns a 2008 Mercedes-Benz R350. The contact received notification of NHTSA Campaign Number: 22V315000 (Service Brakes, Hydraulic) however, the part to do the recall repair was not yet available. The dealer was made aware of the issue. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The contact had not experienced a failure. VIN tool confirms parts not available.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Electrical
Reports naming the electrical system — wiring, battery, charging, control modules, infotainment and electrical accessories.
From owner reports, verbatim
I SEE I HAVE RECALLS FOR THE BACK HATCH DOOR AND SOME SUSPENSION RECALLS ELECTRICAL ALSO AIR RISING SYSTEM FOR A 2008 ARE 350 MERCEDES I CALL THE SYRACUSE NEW YORK DEALER AND THEY SAID IT IS NOT UP FOR RECALLS BUT THIS IS HOW I FOUND OUT IT WAS UP FOR RECALLS. *TR
ELECTRICAL WIRING AROUND HEADLAMPS IS CRUMBLING AND EXPOSING LARGE LENGTHS OF BARE WIRES, WITH UP TO ABOUT 6" OF COPPER WIRING EXPOSED IN THE ENGINE COMPARTMENT. I REPLACED A BURNED OUT HALOGEN HEADLAMP IN JUNE, THE OTHER ONE IN AUGUST, AND THE FIRST ONE WENT OUT AGAIN ABOUT A WEEK AGO (AND THIS RATE OF HEADLAMP REPLACEMENT IS MORE OR LESS TYPICAL; I KEEP TWO SPARES IN MY CAR AT ALL TIMES, AS BURNOUTS ARE SO FREQUENT). THE BARE WIRES MAY BE CONTRIBUTING TO THE EXTREMELY SHORT BULB LIFE AND COULD ALSO CAUSE ARCING AND POTENTIALLY AN ENGINE FIRE. ALTHOUGH AN ENGINE FIRE HAS NOT HAPPENED YET, THE ARCING IS EXTREMELY LIKELY. HOWEVER, THE AREA WHERE THIS OCCURS IS SO HAS EXTREMELY RESTRICTED ACCESS AND DIRECT VISION INTO AND AROUND THE HEADLAMP MOUNT IS NOT POSSIBLE. ONLY UPON INSERTING MY IPHONE INTO THE AVAILABLE SPACE WAS I ABLE TO SEE THE EXTENT OF THE WIRING INSULATION DETERIORATION.VIRTUALLY ALL OF THE SEGMENTED INSULATION ON THE BROWN WIRE FLAKED OFF ON MY FINGERS WHEN I INSTALLED THE NEW HEADLAMP. ALTHOUGH THE BROWN WIRE WAS MOST AFFECTED, THE YELLOW WIRE ALSO SHOWS SIGNIFICANT SIGNS OF DETERIORATION. I WORKED IN THE AUTOMOTIVE INDUSTRY FOR OVER TEN YEARS AS AN OEM SUPPLIER AND VEHICLE MANUFACTURER AND SUCH DEFECTS AS THIS TEND TO INDICATE INFERIOR MATERIALS OR MANUFACTURING PROCESSES. MATERIALS THIS FRAGILE SHOULD HAVE BEEN CAUGHT IN THE QA PROCESS AND RETURNED TO THE SUPPLIER BEFORE INSTALLATION ON THE ASSEMBLY LINE.
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
TL* THE CONTACT OWNS A 2008 MERCEDES-BENZ R350. WHILE DRIVING APPROXIMATELY 45 MPH, THE ENGINE MADE A LOUD NOISE AND THE VEHICLE SHUT OFF. THE VEHICLE WAS TOWED TO AN INDEPENDENT MECHANIC WHO DIAGNOSED THAT THE ENGINE NEEDED TO BE REPLACED DUE TO A FAULTY BALANCE SHAFT. THE ENGINE WAS REPLACED, BUT THE FAILURE RECURRED WITHIN A COUPLE OF WEEKS. THE VEHICLE WAS TOWED TO ANOTHER MERCEDES-BENZ MECHANIC WHERE THE ENGINE WAS REPLACED AGAIN, BUT THE FAILURE RECURRED AFTER A COUPLE OF DAYS. THE VEHICLE WAS TAKEN BACK TO AN INDEPENDENT MECHANIC AND THE ENGINE WAS REPLACED A THIRD TIME. THE FAILURE RECURRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURES AND PROVIDED A CASE NUMBER. THE DEALER WAS NOT CONTACTED. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 158,000.
TL* THE CONTACT OWNS A 2008 MERCEDES-BENZ R350. THE CONTACT STATED THAT THE VEHICLE BEGAN EXPERIENCING ENGINE FAILURES AFTER THE DEALER (SILVER STAR MOTORS, 36-11 NORTHERN BLVD, LONG ISLAND CITY, NY 11101, (855) 216-2452) SERVICED IT DUE TO A FAILURE WITH THE SUN ROOF NOT PROPERLY CLOSING. THE DEALER REPLACED THE SUN ROOF CLIP AND OIL CAM COVER, THE TRANS OIL LEAK WAS SEALED, AND THE OIL FILTER, HOSES, AND DRIVE BELT WERE REPLACED. THE DEALER STATED THAT THE VEHICLE NEEDED TO BE FURTHER DIAGNOSED TO SERVICE THE ENGINE. THE DEALER SERVICED THE ENGINE AND FOUND THAT THE VEHICLE DROVE ROUGHLY. THERE WERE NO WARNING INDICATORS ILLUMINATED. THE DEALER THEN INDICATED THAT THE ENGINE ASSEMBLY NEEDED TO BE REPLACED. THE VEHICLE WAS NOT INCLUDED IN NHTSA CAMPAIGN NUMBER: 08V006000 (ENGINE AND ENGINE COOLING). THE MANUFACTURER WAS NOT NOTIFIED. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS NOT AVAILABLE.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Airbags
Reports naming the air-bag system — deployment behaviour, inflators, sensors and warning lights.
From owner reports, verbatim
THE SRS LIGHT COME AND GOES WHILE DRIVING, THERE IS A LOT OF COMPLAIN ABOUT THE SAME SIMILAR PROBLEMS ONLINE. *TR
IT WAS DIAGNOSED BY MERCEDES MECHANIC THAT MY REAR SUSPENSION REAR AIR BAGS ARE LEAKING AIR. I HAVE PURCHASED COMPATIBLE PARTS FROM AIRBAGIT.COM IN MESA AZ. THE AIRBAGS FAILED AND THE COMPANY DID NOT HONOR THE WARRANTY OR RETURN AGREEMENTS. *TR
Too few reports in this category for a page of its own — they appear in the full complaint list.
Transmission
Reports naming the automatic or manual transmission, including shifting behaviour, shudder, slipping and transmission control modules.
From owner reports, verbatim
06 APRIL 2008 ' VEHICLE LEASED FROM HOEHN MOTORS, CARLSBAD, CA ROUGHLY JANUARY 2009 TO PRESENT ' TRANSMISSION SLIPS (CHANGES GEARS UNEXPECTEDLY) ON SEVERAL OCCASIONS. UNABLE TO REPRODUCE RELIABLY, SO WE DID NOT BRING THE CAR IN OR REPORT. 10 APRIL 2009 ' (MILEAGE 17533) VEHICLE SUDDENLY LOSES POWER UNDER OPERATION. ESP LIGHT IS ON. VEHICLE COASTS TO A STOP. VEHICLE TOWED TO MERCEDES BENZ OF LAGUNA NIGUEL. DEALERSHIP CANNOT REPRODUCE PROBLEM, BUT FINDS ESP SOFTWARE IS OLD. DEALER UPDATES ESP SOFTWARE. 29 JULY 2009 ' (MILEAGE 22399) LOUD CLANGING AND GRINDING NOISE WHILE DRIVING. IMMEDIATELY PULLED TO SIDE OF ROAD. VEHICLE TOWED TO MERCEDES BENZ OF LAGUNA NIGUEL. DEALERSHIP DIAGNOSED AS FAULTY TRANSMISSION AND REPLACED TRANSMISSION. JULY-SEPT 2009 ' TRANSMISSION STILL SLIPS (CHANGES GEARS UNEXPECTEDLY) ON SEVERAL OCCASIONS. UNABLE TO REPRODUCE RELIABLY, SO WE DO NOT BRING THE CAR IN OR REPORT. 25 SEPT 2009 ' (MILEAGE 24703 ' DEALER HAS VEHICLE) VEHICLE SUDDENLY LOSES POWER UNDER OPERATION. ESP LIGHT IS ON (SAME SYMPTOMS AS EVENT ON APRIL 10, 2009). VEHICLE COASTS TO A STOP. VEHICLE TOWED TO MERCEDES BENZ OF LAGUNA NIGUEL. DEALERSHIP CANNOT REPRODUCE OR ISOLATE PROBLEM. VERBALLY NOTIFIED THE SERVICE REP,THAT THE TRANSMISSION HAS 'SLIPPED' ON SEVERAL OCCASIONS. STANDARD, SCHEDULED SERVICE ALSO PERFORMED. 02 OCT 2009 ' (MILEAGE 24783) VEHICLE RETURNED TO US AFTER A WEEK. TRANSMISSION STILL SLIPS NOVEMBER 2009 - RETURNED CAR, FILING LEMON LAW LAWSUIT. *TR
Too few reports in this category for a page of its own — they appear in the full complaint list.
Driver assistance
Reports naming forward-collision avoidance, lane keeping, back-over prevention, cruise control and related electronic driver-assistance systems.
From owner reports, verbatim
I SEE I HAVE RECALLS FOR THE BACK HATCH DOOR AND SOME SUSPENSION RECALLS ELECTRICAL ALSO AIR RISING SYSTEM FOR A 2008 ARE 350 MERCEDES I CALL THE SYRACUSE NEW YORK DEALER AND THEY SAID IT IS NOT UP FOR RECALLS BUT THIS IS HOW I FOUND OUT IT WAS UP FOR RECALLS. *TR
Too few reports in this category for a page of its own — they appear in the full complaint list.
Fuel system
Reports naming fuel storage or delivery — tanks, pumps, lines, injectors and fuel leaks.
From owner reports, verbatim
THE FUEL DOESN'T READ WHAT IS ACTUALLY IN MY CAR.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Interior & seats
Reports naming seats, latches, locks, linkages and interior fittings.
From owner reports, verbatim
SAFETY CONCERN WITH MERCEDES BENZ R350 2008. CHILD SAFETY LOCKS IN THE REAR SEAT ARE NOT AVAILABLE IN THIS VEHICLE. I HAVE TWO CHILD 4 & 2 YEAR. THERE WERE PLAYING WITH THE DOOR HANDLE AND THE DOOR LOCK AND OPENED THE DOOR WHILE THE VEHICLE WAS IN USED. NO CRASH. THIS RISK CAN BE DANGEROUS FOR MY KIDS. SINCE I BOUGHT THIS VEHICLE I THOUGHT THAT THIS FEATURE WAS AVAILABLE AND THAT IT WAS AUTOMATIC BUT NO. THE DEALER SAID NO SOLUTION . *TR
Too few reports in this category for a page of its own — they appear in the full complaint list.
Exterior lighting
Reports naming headlights, tail lights, turn signals and other exterior lighting.
From owner reports, verbatim
ELECTRICAL WIRING AROUND HEADLAMPS IS CRUMBLING AND EXPOSING LARGE LENGTHS OF BARE WIRES, WITH UP TO ABOUT 6" OF COPPER WIRING EXPOSED IN THE ENGINE COMPARTMENT. I REPLACED A BURNED OUT HALOGEN HEADLAMP IN JUNE, THE OTHER ONE IN AUGUST, AND THE FIRST ONE WENT OUT AGAIN ABOUT A WEEK AGO (AND THIS RATE OF HEADLAMP REPLACEMENT IS MORE OR LESS TYPICAL; I KEEP TWO SPARES IN MY CAR AT ALL TIMES, AS BURNOUTS ARE SO FREQUENT). THE BARE WIRES MAY BE CONTRIBUTING TO THE EXTREMELY SHORT BULB LIFE AND COULD ALSO CAUSE ARCING AND POTENTIALLY AN ENGINE FIRE. ALTHOUGH AN ENGINE FIRE HAS NOT HAPPENED YET, THE ARCING IS EXTREMELY LIKELY. HOWEVER, THE AREA WHERE THIS OCCURS IS SO HAS EXTREMELY RESTRICTED ACCESS AND DIRECT VISION INTO AND AROUND THE HEADLAMP MOUNT IS NOT POSSIBLE. ONLY UPON INSERTING MY IPHONE INTO THE AVAILABLE SPACE WAS I ABLE TO SEE THE EXTENT OF THE WIRING INSULATION DETERIORATION.VIRTUALLY ALL OF THE SEGMENTED INSULATION ON THE BROWN WIRE FLAKED OFF ON MY FINGERS WHEN I INSTALLED THE NEW HEADLAMP. ALTHOUGH THE BROWN WIRE WAS MOST AFFECTED, THE YELLOW WIRE ALSO SHOWS SIGNIFICANT SIGNS OF DETERIORATION. I WORKED IN THE AUTOMOTIVE INDUSTRY FOR OVER TEN YEARS AS AN OEM SUPPLIER AND VEHICLE MANUFACTURER AND SUCH DEFECTS AS THIS TEND TO INDICATE INFERIOR MATERIALS OR MANUFACTURING PROCESSES. MATERIALS THIS FRAGILE SHOULD HAVE BEEN CAUGHT IN THE QA PROCESS AND RETURNED TO THE SUPPLIER BEFORE INSTALLATION ON THE ASSEMBLY LINE.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Seat belts
Reports naming seat belts, buckles, retractors and pretensioners.
From owner reports, verbatim
THE SRS LIGHT COME AND GOES WHILE DRIVING, THERE IS A LOT OF COMPLAIN ABOUT THE SAME SIMILAR PROBLEMS ONLINE. *TR
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 .