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Model reliability

Mercedes-Benz Slc reliability

The Mercedes-Benz Slc fails its MOT less often than most cars 6 to 10 years old: 14.4% of 5,751 tests failed in 2023, against 24.4% on average.

Up to 5 years old
9% failed their MOT
Better than most
From 2,597 MOT tests of Mercedes-Benz Slcs this age.
Where it does worse than other cars this age
Fails 47% more oftenTyre condition4.7% vs 3.2%Fix about £90
Advised 44% more oftenTyre condition12.1% vs 8.4%Fix about £90
6 to 10 years old
14.4% failed their MOT
Better than most
From 5,751 MOT tests of Mercedes-Benz Slcs this age.
Where it does worse than other cars this age
Fails 74% more oftenTyre condition6.1% vs 3.5%Fix about £90
Safety recalls

16 DVSA recalls for the Mercedes-Benz Slc

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/2021/37629 Nov 2021Built 2016–2021The behaviour of the emergency call system might not meet specifications

The behaviour of the emergency call system might not meet specifications.

Fix: Update the software of the communication module for the emergency call system.

Recalled models: SLK/SLC · 50,390 vehicles

R/2021/11013 May 2021Built 2016–2021The behaviour of the emergency call system might not meet specifications

The behaviour of the emergency call system might not meet specifications.

Fix: Update the software of the communication module for the emergency call system.

Recalled models: SLK/SLC · 108,971 vehicles

R/2021/12011 May 2021Built 2016–2021The behaviour of the emergency call system might not meet specifications

The behaviour of the emergency call system might not meet specifications.

Fix: Update the software of the communication module for the emergency call system.

Recalled models: SLK/SLC · 86,604 vehicles

R/2021/11110 May 2021Built 2016–2021The behaviour of the emergency call system might not meet specifications

The behaviour of the emergency call system might not meet specifications.

Fix: Update the software of the communication module for the emergency call system.

Recalled models: SLK/SLC · 90,716 vehicles

R/2021/1325 May 2021Built 2016–2021The behaviour of the emergency call system might not meet specifications

The behaviour of the emergency call system might not meet specifications.

Fix: Update the software of the communication module for the emergency call system.

Recalled models: SLK/SLC · 10,410 vehicles

R/2021/1315 May 2021Built 2016–2021The behaviour of the emergency call system might not meet specifications

The behaviour of the emergency call system might not meet specifications.

Fix: Update the software of the communication module for the emergency call system.

Recalled models: SLK/SLC · 81,267 vehicles

R/2021/1345 May 2021Built 2016–2021The behaviour of the emergency call system might not meet specifications

The behaviour of the emergency call system might not meet specifications.

Fix: Update the software of the communication module for the emergency call system.

Recalled models: SLK/SLC · 162,581 vehicles

R/2021/1335 May 2021Built 2016–2021The emergency call system might not meet specifications

The behaviour of the emergency call system might not meet specifications.

Fix: Update the software of the communication module for the emergency call system.

Recalled models: SLK/SLC · 106,665 vehicles

R/2021/08330 Mar 2021Built 2017–2020The software of certain communication modules may not meet specifications

The software of certain communication modules may not meet specifications.

Fix: Carry out an update to the software of the communication module on affected vehicles.

Recalled models: SLK/SLC · 36 vehicles

R/2021/08230 Mar 2021Built 2016–2020The communication module may be deactivated

The communication module may be deactivated

Fix: Carry out a check of the configuration of the communication module on affected vehicles and if necessary activate the communication module.

Recalled models: SLK/SLC · 24 vehicles

R/2020/2366 Oct 2020Built 2017–2018THE EMERGENCY CALL SYSTEM (eCall) DOES NOT MEET THE SPECIFICATION

On affected vehicles the software of the communication module for the emergency call system does not meet the specification

Fix: Update the software of the communication module for the emergency call system

Recalled models: SLC · 3,127 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: SLC · 994 vehicles

R/2020/0115 Feb 2020Built 2015–2017Emission output requires improvement

Emission output requires improvement

Fix: Update software in the engine control unit and replace the NOx sensor if required.

Recalled models: SLC · 5,255 vehicles

R/2018/26819 Nov 2018Built 2017–2018Doors on left vehicle side (passenger side) remain permanently locked after the vehicle has been locked/unlocked with the remote control key

Possible inability to open the left hand door externally or internally.

Fix: Replace the affected door locks on the left side of the vehicle.

Recalled models: SLC · 5,030 vehicles

R/2017/15714 Jun 2017Built 2015–2017Brakes may overheat creating a risk of smoke and/or fire

The software for the Electronic Stability Program (ESP) is faulty. The fault could lead to a low residual pressure in the hydraulic system so the brakes are applied and gain heat. This increased heat will apply the brakes further and could adversely affect the brake fluid. Fire in the wheel housing cannot be ruled out.

Fix: Recall the vehicles that are likely to be affected and update the software for the ESP.

Recalled models: SLC · 6,460 vehicles

R/2015/25921 Jan 2016Built 2015Risk of fire

The high pressure fuel lines have not been manufactured to the correct specification which over time can lead to crack formation and fuel leaking. Fuel escaping in the presence of an ignition source could lead to fire.

Fix: Recall the vehicles that are likely to be affected and replace the high pressure fuel lines.

Recalled models: SLC · 1,327 vehicles

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

Checking a Mercedes-Benz Slc 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.

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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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