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Model reliability

Mercedes-Benz Ml reliability

The Mercedes-Benz Ml fails its MOT less often than most cars over 10 years old: 33.4% of 24,672 tests failed in 2023, against 39.7% on average.

6 to 10 years old
17.7% failed their MOT
Better than most
From 11,502 MOT tests of Mercedes-Benz Mls this age.
Where it does worse than other cars this age
Fails 42% more oftenSprings3.4% vs 2.4%Fix about £150
Fails 55% more oftenExhaust emissions3.1% vs 2%Fix about £150
Over 10 years old
33.4% failed their MOT
Better than most
From 24,672 MOT tests of Mercedes-Benz Mls this age.
Where it does worse than other cars this age
Fails 41% more oftenSprings5.8% vs 4.1%Fix about £150
Fails 83% more oftenDirection indicators4.2% vs 2.3%
Fails 88% more oftenRigid brake pipes3.2% vs 1.7%Fix about £120
Fails 2× as oftenFlexible brake hoses1.2% vs 0.5%Fix about £120
Advised 2× as oftenFluid leaks22.1% vs 10.1%
Advised 94% more oftenRigid brake pipes16.1% vs 8.3%Fix about £120
Advised 86% more oftenTransmission5.4% vs 2.9%
Safety recalls

12 DVSA recalls for the Mercedes-Benz Ml

Most cover a batch of cars built in a set period, and dealers fix them free. Sweep’s check shows the recalls for a car’s age and whether the DVSA has one outstanding.

R/2023/02320 Feb 2023Built 2011–2017On affected vehicles the aluminium bolts of the steering gear could corrode and break due to the intrusion of moisture.

On affected vehicles the aluminium bolts of the steering gear could corrode and break due to the intrusion of moisture.

Fix: Replace the steering gear mounting bolts on the affected vehicles with steel bolts. Should the bolts break or already be broken change the steering gear.

Recalled models: ML · 51,251 vehicles

R/2023/02120 Feb 2023Built 2011–2018On affected vehicles water might accumulate in the spare wheel well. The water could briefly come into contact with the fuel pump control unit impairing the fuel supply to the engine.

On affected vehicles water might accumulate in the spare wheel well. The water could briefly come into contact with the fuel pump control unit impairing the fuel supply to the engine.

Fix: Install a water drain plug in the spare wheel well check for water infiltration and replace the fuel pump control unit if necessary.

Recalled models: ML · 31,569 vehicles

R/2022/27930 Sept 2022Built 2005–2013The function of the brake booster might be affected due to advanced corrosion in the joint area of its housing.

The function of the brake booster might be affected due to advanced corrosion in the joint area of its housing.

Fix: Replace brake booster in vehicles that have not passed XENTRY test and require part replacement.

Recalled models: ML · 218 vehicles

R/2022/27830 Sept 2022Built 2005–2013The function of the brake booster might be affected due to advanced corrosion in the joint area of its housing.

The function of the brake booster might be affected due to advanced corrosion in the joint area of its housing.

Fix: Replace brake booster in vehicles that have not passed XENTRY test and require part replacement.

Recalled models: ML · 6,442 vehicles

R/2022/14024 May 2022Built 2005–2013The function of the brake booster might be affected due to advanced corrosion in the joint area of its housing

The function of the brake booster might be affected due to advanced corrosion in the joint area of its housing.

Fix: Check the brake booster on the affected vehicles and - depending on the result of this inspection - replace it where necessary.

Recalled models: ML · 1,631 vehicles

R/2022/13724 May 2022Built 2005–2013The function of the brake booster might be affected due to advanced corrosion in the joint area of its housing

The function of the brake booster might be affected due to advanced corrosion in the joint area of its housing.

Fix: Check the brake booster on the affected vehicles and - depending on the result of this inspection - replace it where necessary.

Recalled models: ML · 31,666 vehicles

R/2020/2436 Oct 2020Built 2011–2018Engine control unit software to be updated

Improve the vehicle emissions via software updates.

Fix: Update the relevant control unit�s software and if necessary replace the NOx sensors.

Recalled models: ML/GLE · 994 vehicles

R/2020/2313 Sept 2020Built 2012–2017Software update to improve emissions

Improve the vehicle emissions via software updates

Fix: Update the diesel engine control unit software and add a supplementary booklet for the operator's manual. Check and replace N0x sensor if necessary.

Recalled models: ML/GLE · 1,230 vehicles

R/2017/01214 Feb 2017Built 2014–2015Front and/or rear axle bolts may not be tightened correctly

The front and/or rear axle mounting bolts may not be tightened to the correct specification. The bolts may break and could affect control of the vehicle.

Fix: On affected vehicles replace the front and rear axle carrier bolts.

Recalled models: ML CLASS · 3 vehicles

R/2016/29930 Jan 2017Built 2014–2016Front passenger airbag may be deactivated

Under certain conditions the front passenger air bag can be deactivated and may not deploy in the event of a collision.

Fix: On affected vehicles check and if necessary update software.

Recalled models: ML CLASS · 3,993 vehicles

R/2016/15018 Jul 2016Built 2015Threaded connection of the right rear seat belt end fitting may fail in a collision

Due to a deviation in the manufacturing process the retaining bolt for the right rear seal belt may not have been tightened to the correct specification. In the event of a collision the belt may fail.

Fix: Where necessary rework threaded connection tighten securing bolt to correct specification.

Recalled models: ML CLASS · 54 vehicles

R/2011/13131 Oct 2011Cruise control may fail to deactivate

It has been identified that a fault in the brake light switch may in very rare cases cause the cruise control to not deactivate when the brake is applied.

Fix: Recall the affected vehicles and replace the brake switch.

Recalled models: ML CLASS · 20,276 vehicles

DVSA vehicle safety recalls (Crown copyright, Open Government Licence).

Checking a Mercedes-Benz Ml before you buy

Look at the parts above at the viewing, and read the car’s own MOT history: advisories for the same parts suggest the problem is already starting. Sweep’s free check shows every MOT, advisory and mileage reading for a registration.

Source: DVSA anonymised MOT tests 2023 (Open Government Licence v3.0). Failure rates compare this model with all cars in the same age band. Fix prices are typical independent-garage estimates.
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