2012 Mercedes-Benz Ml550 problems, complaints & recalls
Most-reported problem areas: Lane Departure: Blind Spot Detection (1) · Fuel/Propulsion System (1)
Safety recalls (3)
Fuel System, Gasoline:delivery:fuel Pump:control/Drive Module 2022-12-23 · campaign 22V955000 · 348,183 vehicles
Defect: Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2012-2014 ML550, 2012-2015 ML350, AMG ML63, 2015 ML250, ML400, 2016 GLE450, GLE300, 2016-2018 GLE350, GLE550, 2016-2019 GLE400, 2017-2019 AMG GLE43, and 2016-2020 AMG GLE63 vehicles. Water might accumulate in the spare tire wheel well and damage the fuel pump control unit, which could cause an engine stall while driving.
Risk: An engine stall while driving increases the risk of a crash.
Fix: Dealers will install a water drain plug, inspect for water intrusion, and replace the fuel pump control unit as necessary, free of charge. Owner notification letters were mailed February 15, 2023. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's numbers for this recall are 2023010002 and 2023010003.
Suspension:front 2018-04-27 · campaign 18V272000 · 9,725 vehicles
Defect: Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2012-2014 ML350 Bluetec 4Matic and ML550 4Matic, 2012-2015 ML63 AMG 4Matic and ML350 4Matic, 2013-2016 GL350 Bluetec 4Matic, GL550 4Matic and GL63 AMG 4Matic, 2017 GLS350d 4Matic, GLS450 4Matic, GLS550 4Matic and GLS63 AMG 4Matic, 2015 ML400 4Matic, 2016 GLE400 4Matic, GLE350 4Matic, GLE63 AMG 4Matic, GLE63S AMG 4Matic, GLE450 4Matic Coupe and GLE63S AMG 4Matic Coupe, 2015-2016 GL450 4Matic and 2013-2014 GL450 4Matic vehicles equipped with the
Risk: The leaking oil in the presence of an ignition source can increase the risk of a fire.
Fix: MBUSA will notify owners, and dealers will correct the oil level as necessary and replace the reservoir sealing cap to prevent oil foam from leaking out, free of charge. The recall began August 30, 2018. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2018070015.
Equipment 2012-08-09 · campaign 12E028000 · 8,879 vehicles
Defect: Mercedes-Benz is recalling certain accessory all-season floor mats sold for use in model year 2012 and 2013 Mercedes-Benz ML-Class vehicles. This all-season floor mat may not fully conform to the contour of the vehicle's floor plan as intended. Clearance between the mat and the gas pedal may be reduced, possibly allowing the pedal to become trapped.
Risk: This interference could prevent the gas pedal from retracting and the vehicle may not decelerate as expected when the driver lifts their foot from the gas pedal, which could increase the risk of a crash. Should the pedal become trapped, steady application of the brakes will allow the vehicle to be brought to a stop.
Fix: Mercedes-Benz will notify owners, and dealers will replace the floor mats free of charge. Until replacement mats become available, consumers are advised to remove their floor mats from the vehicle. The safety recall began on December 21, 2012. Only vehicles equipped with the accessory floor mats are affected. Owners may contact Mercedes-Benz for more information at 1-800-367-6372.
Service bulletins (114)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Service Brakes 2026-09-22 · LI42.10-P-078779 · Service Bulletin/Repair Instructions
complaint repeat workshop visit for vehicle vibration while braking from 60mph. note: although the symptom is similar to a tire or wheel vibration, it is usually readily noticeable that it is distinctly different if it happens at all times or only while braking. cause although the cause of the vibra
Structure:body 2026-09-14 · LI82.62-P-078631 · Service Bulletin/Repair Instructions
complaint clanking noise from the area of the speakers in the doors. cause under analysis. remedy to narrow down the cause, first of all remove the door trim. • if the noise continues to occur even with the door trim removed, then continue the diagnosis working towards the speaker and if necessary,
Steering 2026-08-28 · LI46.35-P-067339 · Service Bulletin/Repair Instructions
complaint during part of the steering movement, it feels heavier or more difficult to steer in the same spot every time. or rattling, humming, dry sliding/gravel noise from the electric steering system when steering (see attachment). complaint does not impact the ability to safely steer or control
Structure:body 2026-08-06 · LI82.62-P-078631 · Service Bulletin/Repair Instructions
complaint clanking noise from the area of the speakers in the doors. cause under analysis. remedy to narrow down the cause, first of all remove the door trim. • if the noise continues to occur even with the door trim removed, then continue the diagnosis working towards the speaker and if necessary,
Power Train 2026-07-14 · LI35.30-P-058566 · Service Bulletin/Repair Instructions
single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end). the noise is heard once in each instance when changing direction of travel. note: sound file in attachment cause if the complaint is eliminated by experimentally loosening the outboard collar n
Suspension 2026-07-08 · LI33.20-P-078406 · Service Bulletin/Repair Instructions
complaint creaking noise, in irregular sequence when driving slowly in combination with slight steering movements and/or creaking/crackling noises from the area of the wheel bearing on the front axle when cornering/ maneuvering. sound file attached for comparison. must match noise for proper diagnos
Showing the 6 most recent of 114 bulletins. Search all of them free at nhtsa.gov.
What owners report
2026-10-27 · Fuel/Propulsion System“*2012 ml550 benz fuel pump control module re: formal demand for repair – fuel pump control unit replacement vehicle: mercedes‑benz ml550 vin: [xxx] recall: nhtsa recall campaign no. xxx to mercedes‑benz usa: i am submitting this formal demand for repair of the cost to replace the fuel pump control unit in my mercedes‑benz ml550. the vehicle s…”
2023-03-15 · Lane Departure: Blind Spot Detection“in the last year, randomly, when starting the vehicle, the yellow check engine light comes on. turn the vehicle off, it is gone. the side view mirrors have the yellow lights lit up on them when driving down any road, the red warning lights that tell you there's something behind or in front of you start going off for no reason while driving down …”
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.