RoadVitals

2012 Mercedes-Benz GL450 Problems

Owner-reported complaints filed with NHTSA, grouped by component

Data refreshed

Owner complaintsComplaints are reports submitted to NHTSA by owners and drivers. NHTSA does not verify most reports before publishing them, and a complaint does not establish that a defect exists. Volume is influenced by how many of a vehicle were sold, how long it has been on the road, and how much attention an issue has received.
45
Latest Sep 14, 2023
Components namedHow many of our component categories appear on at least one report for this model year. One report can name several.
10
Crash or fire reportedComplaints whose submitter recorded that a crash or a fire occurred. These are the reporter's own answers on the NHTSA form, not verified findings.
3

What this page shows

Everything below is an owner-reported complaint submitted to NHTSA about the 2012 Mercedes-Benz GL450, 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

  • Airbags2142.0%
  • Brakes714.0%
  • Suspension714.0%
  • Powertrain (other)510.0%
  • Fuel system24.0%
  • Electrical24.0%
  • Seat belts24.0%
  • Driver assistance24.0%
  • Steering12.0%
  • Tires & wheels12.0%

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

Airbags

Reports naming the air-bag system — deployment behaviour, inflators, sensors and warning lights.

21
reports

From owner reports, verbatim

TAKATA RECALL SINCE JANUARY 2018 I HAVE BEEN WAITING FOR THE REPLACEMENT PARTS TO ARRIVE FOR THIS RECALL. I HAVE MOVED TO CANADA AND IN ORDER TO TRANSFER MY VEHICLE THERE CAN BE NO OUTSTANDING RECALLS. I HAVE BEEN CONTACTING MERCEDES FOR OVER A YEAR YET THEY ARE UNABLE TO PROVIDE ANY ANSWERS AS TO WHEN THE REPAIR WILL BE DONE. THIS RECALL HAS BEEN OUTSTANDING FOR FAR TOO LONG AND IS PREVENTING ME FROM TRANSFERRING MY VEHICLE.

NHTSA ID 11219060 · filed Jun 10, 2019

TAKATA RECALL. RECALL WAS ISSUED IN FEBRUARY 2016 AND I'M STILL WAITING FOR THE AIRBAG TO BE FIXED. MERCEDES BENZ HAS FAILED TO REMEDY MY CAR IN A TIMELY MANNER AND THEY HAVE NOT OFFERED ANY ALTERNATIVE SOLUTION, RENTAL CAR OR LOANER CAR WHILE I WAIT. IT HAS BEEN 39 MONTHS SINCE THE RECALL WAS ISSUED AND THERE IS NO INDICATION FROM MERCEDES WHEN THIS WILL BE FIXED.

NHTSA ID 11208464 · filed May 18, 2019
All 21 reports naming airbags

Brakes

Reports naming service brakes, the antilock braking system, brake hoses, master cylinders or the parking brake.

7
reports

From owner reports, verbatim

The contact owns a 2012 Mercedes-Benz GL450. 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 contact had stated that while depressing the brake pedal there was an abnormal grinding sound coming from the vehicle. The manufacturer was not made aware of the issue. The failure mileage was unknown. Parts distribution disconnect.

NHTSA ID 11544543 · filed Sep 14, 2023

Breaks became unusable due to lost power break fluid caused by corrosion on the lines. Fluid was completely gone and breaks were not effective at all. Dashboard showed RED light with break error. Dealer confirmed that rust build up caused the failure.

NHTSA ID 11502596 · filed Jan 19, 2023

Too few reports in this category for a page of its own — they appear in the full complaint list.

Suspension

Reports naming suspension components — springs, struts, shocks, control arms and related hardware.

7
reports

From owner reports, verbatim

THE REAR SUSPENSION BECAME SOFT AFTER THE DEALER DID AN INTIAL CHECK AFTER I COMPLAINED ABOUT THE VEHICLE FEELING UNSTABLE AFTER SPEEDS OF 70MPH. I HAD BOTH AIR SHOCKS CHANGED IN THE REAR. AFTER TWO (2) MONTHS THE FRONT SUSPENSION ON THE PASSENGER ALSO STARTED TO LEAK CAUSING THE VEHICLE TO SUSPENSION TO AUTOMATICALLY ADJUST IN THE FRONT WHILE DRIVING OR PARKED. THIS OCCURED WHETHER THE VEHICLE WAS PARKED OR IN MOTION, HIGHWAY OR CITY STREETS.

NHTSA ID 11311208 · filed Feb 24, 2020

4-5 MILES INTO DRIVING AIRMATIC MALFUNCTION APPEARS ON MY DASHBOARD ( PICTURE OF AN STRAIGHT UP ARROW IN THE MIDDLE OF CAR PICTURE) WHEN I INCREASE THE SPEED TO 50 MILES THE TACHOMETER GOES CRAZY AND I HEAR LOUD SOUND. CAR HAS LESS THAN 50 000 MILES.

NHTSA ID 11138764 · filed Oct 6, 2018

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.

5
reports

From owner reports, verbatim

The contact owns a 2012 Mercedes-Benz GL450. The contact stated that while merging onto a highway, the vehicle failed to upshift at 32 MPH, without warning. The contact pulled over and restarted the vehicle and was then able to resume normal driving. The contact stated that the failure recurred several times. Neither the dealer nor the manufacturer was notified of the failure. The contact received notification of NHTSA Campaign Number: 22V315000 (Service Brakes, Hydraulics) however, the part to do the recall repair was unavailable. The manufacturer was not notified of the failure. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The vehicle was not repaired. The failure mileage was approximately 140,000.

NHTSA ID 11486630 · filed Sep 27, 2022

AFTER PURCHASING THE VEHICLE USED FROM A DEALER (WITH @ 36,000 MILES) I STARTED HAVING TRANSMISSION PROBLEMS WITHIN A YEAR. WHEN I WOULD BE STOPPED ON A HILL/INCLINE AND THEN ACCELERATE THE CAR WOULD VIOLENTLY JERK (AS IF I HAD HIT SOMETHING). IT WOULD NOT GO FORWARD UNTIL AFTER THE SUDDEN JERKING MOTION STOPPED. IT WOULD ALSO BEHAVE THIS WAY WHEN I BACKED UP A HILL OR INCLINE. EVERY YEAR I BROUGHT IT TO THE DEALER TO DIAGNOSE AND FIX IT AND THEY TOLD ME THAT THEY COULDN'T REPRODUCE IT WHEN THEY HAD THE CAR, THEREFORE THEY COULDN'T FIND OUT THE PROBLEM. I ALSO TOLD THEM THAT THE ENGINE LIGHT WOULD COME ON AND OFF INTERMITTENTLY, HOWEVER, THEY WERE UNABLE TO FIGURE OUT THE PROBLEM. EVERY TIME I TOOK IT IN FOR A SERVICE THEY DOCUMENTED THE PROBLEM ON THE ESTIMATE SHEET. HOWEVER, THIS LAST TIME I BROUGHT IT IN THEY WERE ABLE TO DIAGNOSE THE PROBLEM AS A FAULTY TRANSMISSION. IT WOULD SLIP OUT OF GEAR WHEN ON A HILL OR SLIGHT INCLINE WHEN PUT INTO DRIVE OR REVERS FROM A COMPLETE STOP. COME TO FIND OUT WHEN RESEARCHING THESE CARS THAT MERCEDES HAVE HAD THIS PROBLEM WITH THEIR ENGINES FOR A LONG TIME.

NHTSA ID 11340730 · filed Jul 21, 2020

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.

2
reports

From owner reports, verbatim

THERE IS A STRONG ODOR OF GAS COMING FROM THE BACK DRIVERS SIDE WHEEL WHEN PARKED AND WHEN DRIVING. WE HAVEN'T FOUND ANY GAS ON THE FLOOR OF OUR GARAGE BUT DEFINITELY A STRONG GAS SMELL AND FUMES. WE HAVE TRIED TO FILL THE TANK 1/2 WAY BUT IT DOESN'T SEEM TO HELP THE SMELL/FUMES ARE THROUGHOUT OUR ENTIRE HOUSE INCLUDING THE 3RD FLOOR WHEN THE CAR IS PARKED IN THE GARAGE. I AM WORRIED ABOUT IT EXPLODING OR CATCHING ON FIRE. I HAVE READ ONLINE OF OTHER MERCEDES LEAKING GAS AND WONDER IF THIS IS HAPPENING TO ANYONE ELSE WHO OWNS A GL 450?

NHTSA ID 11149871 · filed Nov 7, 2018

WHILE DRIVING AT HIGHWAY SPEED IN THE LEFT LANE OF A DIVIDED HIGHWAY, THE VEHICLE SUDDENLY AND WITHOUT NOTICE LOST ENGINE POWER AND POWER STEERING. THE WEATHER CONDITION WAS LIGHT RAIN AND THE ROAD WAS WET. I WAS ABLE TO MOVE OVER TO THE SHOULDER OF THE HIGHWAY AND RESTART THE ENGINE BUT IT DIED WITHIN TWO TO THREE SECONDS. I THEN RESTARTED THE ENGINE SEVERAL MORE TIMES AND WAS ABLE TO MAINTAIN A RUNNING ENGINE AFTER ABOUT 5 RESTART CYCLES. THE ENGINE LOSS OF POWER HAS BEEN TRACED BACK BY A MERCEDES REPAIR CENTER TO A MALFUNCTION OF THE ELECTRICAL WIRING HARNESS CONNECTED TO THE FUEL PUMP IN THE GAS TANK. THIS INCIDENT DEMONSTRATES THAT THE ELECTRICAL SYSTEM MALFUNCTION REPORTED UNDER ITEM #10745399 OCCURS IN WET ROAD CONDITIONS AND NOT JUST WHEN TRAVELING OVER A PUDDLE. MERCEDES REFUSES TO REPAIR THIS SAFETY RELATED DEFECT UNDER WARRANTY.

NHTSA ID 10763948 · filed Sep 15, 2015

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.

2
reports

From owner reports, verbatim

NHTSA HEADQUARTERS 1200 NEW JERSEY AVENUE SE. WEST BUILDING WASHINGTON, DC 20590 TEL: 1-(888)-327-4236 TEL: 1-202-336-9550 EMAIL: [email protected] WEB: WWW.NHTSA.GOV REF: FORMAL COMPLAINT - 2012 MERCEDES-BENZ 450 GL- THE VEHICLE IS NOT SAFE TO DRIVE 1) FAILURE TO PERFORM SAFETY RECALL REPAIR IN TIMELY MANNER - 2) REFUSAL TO CONDUCT REPAIR UNDER ITS ORIGINAL MANUFACTURER WARRANTY 3) REFUSAL TO PROVIDE MONETARY COMPENSATION FOR DEFECTIVE AUTO PARTS & LABOR MR. SIR OR MADAM, THE PURPOSE OF THIS LETTER IS TO NOTIFY THE NHTSA THAT MERCEDES BENZ USA HAS FAILED TO PERFORM SAFETY RECALL REPAIRS IN TIMELY MANNER, AND, THE CORPORATION HAS ALSO REFUSED TO CONDUCT REPAIR UNDER ITS WARRANTY OBLIGATIONS FOR MY 2012 MERCEDES-BENZ 450 GL (VIN: XXXX) ACCORDING TO THE US SAFETY LAWS AND REGULATIONS. THIS LETTER MANDATES THAT MERCEDES BENZ USA SHOULD PERFORM ALL REQUIRED SAFETY RECALL REPAIR FOR DYSFUNCTIONAL AIRBAG INFLATORS AND DEFECTIVE REAR DOOR LOCK & MOTOR FOR OUR CORPORATE VEHICLE - 2012 MERCEDES-BENZ 450 GL IN TIMELY MANNER, NOT LATER THAN 15 DAYS BECAUSE : 1) MERCEDES BENZ USA HAS FAILED TO REFORM ORIGINAL SAFETY RECALL REPAIRS DURING LAST TWO YEARS ' SINCE FEBRUARY 9, 2016. 2) A DRIVER-SIDE EXPLOSION DURING DEPLOYMENT COULD RESULT IN METAL STRIKING THE FRONT PASSENGER OR OTHER OCCUPANTS, POSSIBLY CAUSING SERIOUS INJURY OR DEATH ' SIMPLY THE VEHICLE IS NOT SAFE TO DRIVE. (SEE ATTACHED COPIES). PARTS OF THIS DOCUMENT HAVE BEEN REDACTED TO PROTECT PERSONALLY IDENTIFIABLE INFORMATION PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).

NHTSA ID 11182895 · filed Feb 27, 2019

WHILE DRIVING AT HIGHWAY SPEED IN THE LEFT LANE OF A DIVIDED HIGHWAY, THE VEHICLE SUDDENLY AND WITHOUT NOTICE LOST ENGINE POWER AND POWER STEERING. THE WEATHER CONDITION WAS LIGHT RAIN AND THE ROAD WAS WET. I WAS ABLE TO MOVE OVER TO THE SHOULDER OF THE HIGHWAY AND RESTART THE ENGINE BUT IT DIED WITHIN TWO TO THREE SECONDS. I THEN RESTARTED THE ENGINE SEVERAL MORE TIMES AND WAS ABLE TO MAINTAIN A RUNNING ENGINE AFTER ABOUT 5 RESTART CYCLES. THE ENGINE LOSS OF POWER HAS BEEN TRACED BACK BY A MERCEDES REPAIR CENTER TO A MALFUNCTION OF THE ELECTRICAL WIRING HARNESS CONNECTED TO THE FUEL PUMP IN THE GAS TANK. THIS INCIDENT DEMONSTRATES THAT THE ELECTRICAL SYSTEM MALFUNCTION REPORTED UNDER ITEM #10745399 OCCURS IN WET ROAD CONDITIONS AND NOT JUST WHEN TRAVELING OVER A PUDDLE. MERCEDES REFUSES TO REPAIR THIS SAFETY RELATED DEFECT UNDER WARRANTY.

NHTSA ID 10763948 · filed Sep 15, 2015

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.

2
reports

From owner reports, verbatim

While I was driving the car, with the seat belt fastened, the seat belt suddenly popped out. This was a scary experience! Repeated attempts to fasten the seat belt again did not work. On closer inspection, it appears that something inside the fastening system was probably broken, and the seat belt wasn't getting fastened in there. I immediately took the car to the dealer (Mercedes Benz of El Dorado Hills). After inspecting it, they were able to reproduce the issue (seat belt not getting fastened at all) and advised replacing the seatbelt system on the car. Unfortunately, they did not have the part in stock, so they advised that they would order the part and charge me $800 for this. I can't believe that a fundamental car safety system like this would fail like this. Imagine if there was a car accident and the seat belt just popped out of the fastener, not doing the job it was designed for? Thank you for investigating this issue. It could indeed save a lot of lives, if this is a widespread issue, necessitating a recall campaign from Mercedes.

NHTSA ID 11496088 · filed Dec 5, 2022

TL* THE CONTACT OWNS A 2012 MERCEDES-BENZ GL450. WHILE DRIVING 20 MPH, THE REAR MIDDLE SEAT BELT FRACTURED WITHOUT WARNING. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE ISSUE. THE FAILURE MILEAGE WAS APPROXIMATELY 70,000.

NHTSA ID 10914817 · filed Oct 7, 2016

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.

2
reports

From owner reports, verbatim

THE REAR SUSPENSION BECAME SOFT AFTER THE DEALER DID AN INTIAL CHECK AFTER I COMPLAINED ABOUT THE VEHICLE FEELING UNSTABLE AFTER SPEEDS OF 70MPH. I HAD BOTH AIR SHOCKS CHANGED IN THE REAR. AFTER TWO (2) MONTHS THE FRONT SUSPENSION ON THE PASSENGER ALSO STARTED TO LEAK CAUSING THE VEHICLE TO SUSPENSION TO AUTOMATICALLY ADJUST IN THE FRONT WHILE DRIVING OR PARKED. THIS OCCURED WHETHER THE VEHICLE WAS PARKED OR IN MOTION, HIGHWAY OR CITY STREETS.

NHTSA ID 11311208 · filed Feb 24, 2020

NHTSA HEADQUARTERS 1200 NEW JERSEY AVENUE SE. WEST BUILDING WASHINGTON, DC 20590 TEL: 1-(888)-327-4236 TEL: 1-202-336-9550 EMAIL: [email protected] WEB: WWW.NHTSA.GOV REF: FORMAL COMPLAINT - 2012 MERCEDES-BENZ 450 GL- THE VEHICLE IS NOT SAFE TO DRIVE 1) FAILURE TO PERFORM SAFETY RECALL REPAIR IN TIMELY MANNER - 2) REFUSAL TO CONDUCT REPAIR UNDER ITS ORIGINAL MANUFACTURER WARRANTY 3) REFUSAL TO PROVIDE MONETARY COMPENSATION FOR DEFECTIVE AUTO PARTS & LABOR MR. SIR OR MADAM, THE PURPOSE OF THIS LETTER IS TO NOTIFY THE NHTSA THAT MERCEDES BENZ USA HAS FAILED TO PERFORM SAFETY RECALL REPAIRS IN TIMELY MANNER, AND, THE CORPORATION HAS ALSO REFUSED TO CONDUCT REPAIR UNDER ITS WARRANTY OBLIGATIONS FOR MY 2012 MERCEDES-BENZ 450 GL (VIN: XXXX) ACCORDING TO THE US SAFETY LAWS AND REGULATIONS. THIS LETTER MANDATES THAT MERCEDES BENZ USA SHOULD PERFORM ALL REQUIRED SAFETY RECALL REPAIR FOR DYSFUNCTIONAL AIRBAG INFLATORS AND DEFECTIVE REAR DOOR LOCK & MOTOR FOR OUR CORPORATE VEHICLE - 2012 MERCEDES-BENZ 450 GL IN TIMELY MANNER, NOT LATER THAN 15 DAYS BECAUSE : 1) MERCEDES BENZ USA HAS FAILED TO REFORM ORIGINAL SAFETY RECALL REPAIRS DURING LAST TWO YEARS ' SINCE FEBRUARY 9, 2016. 2) A DRIVER-SIDE EXPLOSION DURING DEPLOYMENT COULD RESULT IN METAL STRIKING THE FRONT PASSENGER OR OTHER OCCUPANTS, POSSIBLY CAUSING SERIOUS INJURY OR DEATH ' SIMPLY THE VEHICLE IS NOT SAFE TO DRIVE. (SEE ATTACHED COPIES). PARTS OF THIS DOCUMENT HAVE BEEN REDACTED TO PROTECT PERSONALLY IDENTIFIABLE INFORMATION PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).

NHTSA ID 11182895 · filed Feb 27, 2019

Too few reports in this category for a page of its own — they appear in the full complaint list.

Steering

Reports naming the steering system — racks, columns, power-steering assist and steering linkage.

1
report

From owner reports, verbatim

THE REAR SUSPENSION BECAME SOFT AFTER THE DEALER DID AN INTIAL CHECK AFTER I COMPLAINED ABOUT THE VEHICLE FEELING UNSTABLE AFTER SPEEDS OF 70MPH. I HAD BOTH AIR SHOCKS CHANGED IN THE REAR. AFTER TWO (2) MONTHS THE FRONT SUSPENSION ON THE PASSENGER ALSO STARTED TO LEAK CAUSING THE VEHICLE TO SUSPENSION TO AUTOMATICALLY ADJUST IN THE FRONT WHILE DRIVING OR PARKED. THIS OCCURED WHETHER THE VEHICLE WAS PARKED OR IN MOTION, HIGHWAY OR CITY STREETS.

NHTSA ID 11311208 · filed Feb 24, 2020

Too few reports in this category for a page of its own — they appear in the full complaint list.

Tires & wheels

Reports naming tires, wheels, hubs, or the tire-pressure monitoring system.

1
report

From owner reports, verbatim

ON 3/27/2019 MY VEHICLE WAS TAKEN TO TIRES PLUS IN NEWNAN, GA FOR PURCHASE OF 4 NEW TIRES- PACIFICALLY MICHELIN LTX. WHEN THOROUGHLY REVIEWING RECEIPT AND INVOICE, I NOTICED SEVERAL ISSUES. PLEASE SEE BELOW THE FOLLOWING: 1. MY HOME ADDRESS WAS INCORRECTLY INPUT INTO THE SYSTEM 2. VIN#: MY PACIFIC VIN# WAS NOT LISTED UNDER VIN# SECTION 3. I RESPECTFULLY ASKED TIREPLUS REP HOW DO I GO ABOUT REGISTERING MY NEW TIRES? IN RESPONSE I WAS TOLD ? HE HAD NEVER HEARD OF REGISTERING TIRES?? I EXPLAINED THE IMPORTANCE TO CORRECT CONSUMER INFO SUCH AS HOME ADDRESS AND PARTICULAR VIN# LISTED AS WELL AS EITHER GIVING ME A TIRE REGISTRATION FORM FOR ME TO COMPLETE AND SUBMIT TO TIRE MANUFACTURER (MICHELIN) OR TO GIVE ME CONFIRMATION THAT HE DIRECTLY ELECTRONICALLY SUBMITTED REGISTRATION FORM DIRECTLY TO TIRE MANUFACTURER. HE EXPLAINED, HE HAD NEVER HEARD OF SUCH PROTOCA. CAN SOMEONE PLEASE ADVISE ME AS TO HOW PROCESS WORKS AND HOW AS A CONSUMER I CAN GO ABOUT VERIFYING IF MY TIRES ARE PROPERLY REGISTERED FOR THE PURPOSE OF POSSIBLE FUTURE RECALL ON NOTIFICATION(S) TO ME? THANK YOU FOR YOUR TIME AND EFFORTS. [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TT

NHTSA ID 11192430 · filed Mar 29, 2019

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

Data on this page last refreshed .