EV ZoneMercedes
Reliability
Are Mercedes reliable? Common problems, MOT data, and full history checks for used Mercedes vehicles.
77.0% MOT pass rate based on 1.5 million tests.
Common faults and reliability ranked across 22 Mercedes models.
Full vehicle history checks for £9.99 with no subscription.
Mercedes Vehicle Check
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- ✓Outstanding finance check
- ✓Stolen marker check
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- ✓Full MOT history and mileage
- ✓Safety recall check
- ✓Vehicle valuation
Are Mercedes cars reliable?
Mercedes vs other premium brands
Mercedes vehicles pass their MOT at 77.0%, comfortably above the national average of 72.4% but at the lower end of the premium peer group. Porsche leads at 87.5%, with BMW, Jaguar, and Audi clustered around 78-79%. Land Rover and Mercedes sit at 77%.
The Mercedes range is a broad church, from the compact A-Class (87% pass) at one end to the Vito commercial van (67% pass) at the other. Passenger cars generally outperform the range average.
Reliability data shows part of the picture. A vehicle history check reveals the rest, including outstanding finance, stolen markers, write-offs, and mileage discrepancies.
What is the Mercedes MOT pass rate by age?
Pass rate at each vehicle age, from 3 to 20 years old. National average shown for comparison.
Newer Mercedes vehicles (3 to 5 years old) pass at 87 to 89%, in line with the national average for the same age range. The Mercedes advantage builds through the middle years: at age 12, Mercedes vehicles pass at 70% vs 66% nationally.
Mercedes pass rates stay above the national average at every age from 5 through 20. Even at 20 years old, Mercedes vehicles pass at 63% vs 58% nationally - a solid indicator that they age gracefully with proper maintenance.
What are the most common Mercedes faults?
Top 10 MOT failure categories for Mercedes, ranked by frequency. National percentage shown alongside.
Top 5 specific Mercedes failure reasons
These are the specific MOT examiner findings most frequently recorded on Mercedes vehicles, along with what they mean.
- Ball joint dust cover severely deteriorated (5.79% of Mercedes failures)
The rubber boot protecting a suspension ball joint has cracked or split, letting dirt into the joint. Common on older cars.
- Ball joint excessively worn (5.37% of Mercedes failures)
A suspension ball joint has developed too much play. Affects steering feel and handling; needs replacement.
- Tread depth below requirements of 1.6mm (5.24% of Mercedes failures)
One or more tyres worn below the legal minimum tread depth. The legal limit is 1.6mm across the central three-quarters of the tyre.
- Damaged but not adversely affecting driver's view (5.06% of Mercedes failures)
Windscreen damage such as a chip or crack that has not yet spread into the driver's line of sight. Commonly caused by road debris.
- Fractured or broken (4.86% of Mercedes failures)
A suspension arm, spring, or bracket has snapped or cracked. The affected part must be replaced before the vehicle is roadworthy.
Mercedes has a distinctly higher share of suspension failures (24.8%) than the national average of 20.7%, and ball-joint dust cover deterioration appears three times in the top five specific failure descriptions. Tyre failures are also elevated at 16.3% vs 10.6% nationally, likely reflecting the larger wheels fitted across much of the range. Lamps and electrical failures are correspondingly lower than average.
Which Mercedes models are most reliable?
Top 15 Mercedes models ranked by MOT test volume. Pass rate shown for each. Green bars beat the national average of 72.4%. Red bars sit below it.
| Model | Tests | Pass rate | Most common failure |
|---|---|---|---|
| Mercedes C | 307,824 | 74.1% | Suspension |
| Mercedes A-Class | 208,192 | 73.3% | Suspension |
| Mercedes E | 193,687 | 76.7% | Suspension |
| Mercedes A | 83,961 | 87.0% | Tyres |
| Mercedes Vito | 73,403 | 66.7% | Lamps, reflectors and electrical equipment |
| Mercedes Glc | 59,010 | 85.4% | Tyres |
| Mercedes Gla | 57,707 | 80.2% | Suspension |
| Mercedes Cla | 55,660 | 79.4% | Tyres |
| Mercedes B-Class | 54,217 | 69.7% | Suspension |
| Mercedes Slk | 48,111 | 71.8% | Suspension |
| Mercedes Gle | 27,071 | 87.0% | Tyres |
| Mercedes Ml | 25,728 | 72.2% | Lamps, reflectors and electrical equipment |
| Mercedes Clk | 22,438 | 63.0% | Suspension |
| Mercedes S-Class | 21,181 | 83.0% | Suspension |
| Mercedes Sprinter | 20,503 | 70.2% | Lamps, reflectors and electrical equipment |
Passenger-car Mercedes models perform well: the A (87.1%), GLC (85.4%), GLA (80.2%), CLA (79.4%), and E (76.7%) all sit at or above the brand average. The A-Class hatchback lags at 73.3%. The clear outlier is the Vito van at 66.7% - a commercial vehicle that gets much harder use and higher mileage than its passenger-car siblings, which pulls the Mercedes range average down.
How many miles do Mercedes vehicles typically cover?
Average recorded mileage at each MOT test, by vehicle age. National average shown for comparison.
Mercedes vehicles cover higher mileage than the national average at every age. At 3 years old they average 31,000 miles vs 28,000 nationally. By age 10 the gap widens to 92,000 vs 80,000. This is consistent with the executive-car and taxi/private-hire profile of many Mercedes models, particularly the E-Class.
Our Premium Vehicle Reports compare the recorded mileage at every MOT test to flag discrepancies. A drop in recorded mileage between two tests is a strong signal that the odometer may have been tampered with.
Are there any Mercedes safety recalls?
Safety recalls are issued by Mercedes when a manufacturing defect could affect the safety of the vehicle. The DVSA records every UK recall and links it to affected vehicle identification numbers (VINs). Recalls are free for the owner to have fixed at a franchised dealer.
Recall lists change over time as new issues are identified and old ones are resolved. For that reason we do not maintain a static list here. When you check a Mercedes via Brumble, the report shows any outstanding manufacturer safety recalls that still need action on that specific vehicle.
How do you check a Mercedes's full history?
Before you buy any used Mercedes, a full history check protects you from problems that a physical inspection would miss. Here is what a Premium Vehicle Report from Brumble covers.
Has this Mercedes been written off?
An insurance write-off means the car has been declared uneconomical to repair after an accident, fire, or flood. The report shows the category (Cat A, B, N, or S), the date, and the cause. Cat A and B are permanently unroadworthy. Cat N and S can legally return to the road but often carry hidden damage and are worth significantly less.
Is there outstanding finance on this Mercedes?
If the previous owner has an active HP, PCP, or loan agreement secured against the car, the finance company legally owns it until the balance is paid off. Buying a car with outstanding finance means the finance company can repossess it, even after you have paid the seller in full. The report checks with Experian for any active finance agreements.
Has this Mercedes been reported stolen?
The Police National Computer records stolen vehicles. The report checks the PNC for any active stolen marker. Buying a stolen vehicle means the police can seize it and return it to the rightful owner, with no compensation.
Has the mileage been tampered with?
Every MOT test records the current mileage. The report shows the full mileage history from every recorded test and flags any drops or unusually flat periods. A drop between tests is a strong signal the odometer has been clocked. A car worth £15,000 with 60,000 miles on the clock might be worth £10,000 if the true mileage is 120,000.
Has this Mercedes been used as a taxi or private hire vehicle?
Ex-taxis and private hire vehicles have typically covered high mileage under harder use than a private car of the same age. Insurers may view them as higher risk, and resale value is significantly lower. The report checks whether the vehicle has ever been registered as a taxi or private hire vehicle.
What is this Mercedes worth?
The report includes current trade, retail, and private-sale valuations based on the vehicle's make, model, trim, mileage, and condition. Use it to check whether the asking price is fair before you negotiate.
Check any Mercedes's full history for £9.99. No subscription.
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What should you check before buying a used Mercedes?
Four practical steps before you hand over any money.
- 1
Check the MOT history
Every UK vehicle has a free MOT test history showing every pass, fail, advisory, and recorded mileage. Use the Brumble MOT checker to see what previous inspections found.
- 2
Check the vehicle's full history
A Premium Vehicle Report covers outstanding finance, stolen markers, write-offs, mileage discrepancies, safety recalls, and valuation. £9.99, no subscription.
- 3
Compare insurance before you commit
Mercedes insurance groups vary widely by model and trim. Get a car insurance quote before you buy to avoid nasty surprises after the sale.
- 4
Check the tax status
Confirm the car is currently taxed, or you may not be able to drive it away. The Brumble tax checker shows current tax status and when tax is next due.
Mercedes Reliability FAQs
Source: Brumble analysis of DVSA anonymised MOT test results, 2025 test year (published June 2026). Class 3 and 4 vehicles with 5,000+ tests per model. Published under Open Government Licence v3.0.