Mercedes Common MOT Problems (2026)
Mercedes models ranked by MOT fail rate, with typical issues to check for cars of each age and type. Based on 3,624,651 MOT tests (DVSA data for tests carried out in 2024, retests included).
Average Mercedes MOT pass rate: 87%
Check Your Mercedes's MOT History
See the specific issues found on your car, plus health score and running cost estimates.
87%
Avg pass rate
13%
Avg fail rate
363
Models tested
Mercedes Models with the Most MOT Problems
Highest average fail rates (models with 1,000+ tests, cars registered up to 2021)
| # | Model | Fail Rate | Typical Issues (estimate) | |
|---|---|---|---|---|
| 1 | Mercedes CLC | 26% | Suspension wear, Brake disc corrosion, Structural corrosion | |
| 2 | Mercedes CLK | 23% | Suspension wear, Brake disc corrosion, Structural corrosion | |
| 3 | Mercedes C 320 | 22% | Suspension wear, Brake disc corrosion, Structural corrosion | |
| 4 | Mercedes Viano | 20% | Suspension wear, Brake disc corrosion, Structural corrosion | |
| 5 | Mercedes B-Class | 19% | Suspension wear, Structural corrosion, Exhaust deterioration |
Most Reliable Mercedes Models
Lowest average fail rates (models with 1,000+ tests, cars registered up to 2021). Newer models tend to pass more often simply because they are younger.
| # | Model | Pass Rate | |
|---|---|---|---|
| 1 | Mercedes GT | 96% | |
| 2 | Mercedes A 200 Exclusive Edition Auto | 96% | |
| 3 | Mercedes GLA 220 AMG Line Prem + D 4M A | 96% | |
| 4 | Mercedes GLA 200 Sport Executive Auto | 96% | |
| 5 | Mercedes G | 95% |
All Mercedes Models by Fail Rate
Every Mercedes model and year with 300+ MOT tests (cars registered up to 2021), sorted by fail rate (highest first). Fuel type is shown as a guide.
| Model | Year | Pass Rate | Fail Rate | |
|---|---|---|---|---|
| A-Class | 1999 | 68% | 32% | |
| A-Class | 2002 | 70% | 30% | |
| A-Class | 2000 | 69% | 30% | |
| B-Class | 2008 | 71% | 28% | |
| A-Class | 2004 | 71% | 28% | |
| A-Class | 2003 | 71% | 28% | |
| C | 2004 | 72% | 27% | |
| A-Class | 2006 | 72% | 27% | |
| B-Class | 2007 | 72% | 27% | |
| CLC | 2008 | 72% | 27% | |
| B-Class | 2006 | 71% | 27% | |
| A-Class | 2001 | 72% | 27% | |
| B-Class | 2005 | 73% | 27% | |
| C | 2006 | 74% | 26% | |
| C | 2005 | 73% | 26% | |
| C | 2003 | 73% | 26% | |
| B-Class | 2010 | 74% | 26% | |
| B-Class | 2009 | 74% | 26% | |
| CLC | 2009 | 73% | 26% | |
| B-Class | 2011 | 73% | 26% | |
| A-Class | 2005 | 73% | 26% | |
| CLC | 2010 | 74% | 26% | |
| ML | 2004 | 73% | 26% | |
| CLC | 2011 | 73% | 26% | |
| ML | 2000 | 73% | 26% | |
| A-Class | 2008 | 74% | 25% | |
| A-Class | 2007 | 74% | 25% | |
| ML | 2003 | 74% | 25% | |
| Viano | 2006 | 74% | 25% | |
| ML | 1999 | 74% | 25% | |
| A-Class | 2009 | 75% | 24% | |
| CLK | 2008 | 75% | 24% | |
| C | 2002 | 75% | 24% | |
| C | 2001 | 75% | 24% | |
| Viano | 2005 | 75% | 24% | |
| C | 2007 | 76% | 23% | |
| A-Class | 2010 | 76% | 23% | |
| CLK | 2005 | 76% | 23% | |
| CLK | 2004 | 76% | 23% | |
| CLK | 2007 | 76% | 23% | |
| CLK | 2006 | 76% | 23% | |
| CLK | 2009 | 76% | 23% | |
| ML | 2005 | 75% | 23% | |
| CLK | 1998 | 77% | 23% | |
| R-Class | 2007 | 74% | 23% | |
| 230 | 1992 | 75% | 23% | |
| C 320 | 2009 | 76% | 23% | |
| C | 2008 | 77% | 22% | |
| C | 2009 | 77% | 22% | |
| A-Class | 2011 | 78% | 22% |
Showing top 50 of 522 model/year combinations. View all Mercedes models
Mercedes MOT FAQ
What are the most common MOT problems on Mercedes cars?
The most common MOT problems on Mercedes cars vary by model and age, but typically include lighting defects, suspension wear, brake wear and tyre condition, which are the most common reasons for failure across all makes in DVSA's published MOT statistics. Older Mercedes diesels are more prone to exhaust and emissions failures. Of the Mercedes models with at least 1,000 tests, the Mercedes CLC has the highest average fail rate at 26%.
Which Mercedes model is the most reliable?
In our data, the Mercedes GT has the best MOT record of the Mercedes models with at least 1,000 tests: 96% of its 4,934 MOT tests ended in a pass and 3% in a fail. Newer models tend to pass more often simply because they are younger, so compare models of a similar age.
What is the average MOT pass rate for Mercedes?
The average MOT pass rate for Mercedes is 87%, based on 3,624,651 MOT tests across 363 models (DVSA MOT data for tests in 2024, retests included). That means roughly 13% of MOT tests on Mercedes cars ended in a fail.
Mercedes Model Problem Guides
Typical issues to check, rough repair costs and year-by-year MOT pass rates for each Mercedes model
Every Mercedes model, A to Z (160)
- Mercedes 190
- Mercedes 190 E
- Mercedes 200
- Mercedes 208 D
- Mercedes 220
- Mercedes 230
- Mercedes 250
- Mercedes 300
- Mercedes 320
- Mercedes 500
- Mercedes A
- Mercedes A 180 AMG Line D
- Mercedes A 180 AMG Line Ed Executive A
- Mercedes A 180 AMG Line Ed Premium + A
- Mercedes A 180 SE D
- Mercedes A 180 Sport Executve Edition A
- Mercedes A 200
- Mercedes A 200 AMG Line Ed Executive A
- Mercedes A 200 AMG Line Ed Premium + A
- Mercedes A 200 Exclusive Edition Auto
- Mercedes A 200 Exclusive Edition D Auto
- Mercedes A 220 Exclusive Edition + D A
- Mercedes A 250 AMG Line E Auto
- Mercedes A 250 AMG Line Ed Executve E A
- Mercedes A 250 AMG Line Ed Premium+ E A
- Mercedes A 250 AMG Line Edition E Auto
- Mercedes A 250 AMG Line Executive E A
- Mercedes A 250 AMG Line Premium + E A
- Mercedes A 250 AMG Line Premium E Auto
- Mercedes A 250 Exclusive Edition + Auto
- Mercedes A-Class
- Mercedes AMG A 45 S 4MATIC+ Auto
- Mercedes AMG A 45 S 4MATIC+ Plus Auto
- Mercedes AMG C 43 Edition Prem + 4M A
- Mercedes AMG C 43 Night Ed Prem + 4M A
- Mercedes AMG CLA 35 Premium + 4MATIC A
- Mercedes AMG CLA 35 Premium 4MATIC Auto
- Mercedes AMG CLA 45 S 4MATIC+ Plus Auto
- Mercedes AMG E 53 NGT Ed Prm+ MHEV 4M+A
- Mercedes AMG GLC 63 S Premium 4M + A
- Mercedes AMG GLE 53 Premium+ MHEV 4M+ A
- Mercedes B
- Mercedes B-Class
- Mercedes C
- Mercedes C 200 AMG Line Ed Prem D A
- Mercedes C 200 AMG Line Ed Prem MHEV A
- Mercedes C 200 AMG Line Edition MHEV A
- Mercedes C 220 AMG Line Ed Prem D A
- Mercedes C 220 AMG Line Edition D Auto
- Mercedes C 220 AMG Line NGT Ed Prem D A
- Mercedes C 300 AMG Line Ed Prem D A
- Mercedes C 300 AMG Line Ed Premium De A
- Mercedes C 300 AMG Line Edition De Auto
- Mercedes C 320
- Mercedes Citan
- Mercedes Citan 109 Pure CDI
- Mercedes CL
- Mercedes CL 500
- Mercedes CLA
- Mercedes CLA 180 AMG Line Auto
- Mercedes CLA 220 AMG Line D Auto
- Mercedes CLA 220 AMG Line Premium + D A
- Mercedes CLA 250 AMG Line Premium E A
- Mercedes CLC
- Mercedes CLK
- Mercedes CLS
- Mercedes E
- Mercedes E 220 AMG Line Ed Prem D A
- Mercedes E 220 AMG Line Edition D Auto
- Mercedes E 220 AMG Line Premium D Auto
- Mercedes E 220 AMG Lne NGT Ed PRM + D A
- Mercedes E 220 AMG Lne Night Ed PRM D A
- Mercedes E 220 Sport D Auto
- Mercedes E 300 AMG Line Edition De Auto
- Mercedes E 300 AMG LN NGT Ed PRM + De A
- Mercedes E 300 AMG LN NGT Ed Prm+mhev A
- Mercedes E 300 AMG LN Night Ed Prem+d A
- Mercedes E 400 AMG LN NGT Ed Prm+d 4M A
- Mercedes EQA 250 AMG Line
- Mercedes EQA 250 AMG Line Premium
- Mercedes EQA 250 Sport
- Mercedes EQA 350 AMG Line 4MATIC
- Mercedes EQC 400 AMG Line 4MATIC
- Mercedes EQC 400 AMG Line Premium + 4M
- Mercedes EQC 400 Sport 4MATIC
- Mercedes EQE 300 AMG Line Premium
- Mercedes EQV 300 Sport Premium
- Mercedes G
- Mercedes G-Class
- Mercedes GL
- Mercedes GL 320
- Mercedes GLA
- Mercedes GLA 180 AMG Line Edition Auto
- Mercedes GLA 180 AMG Line Premium + A
- Mercedes GLA 180 AMG Line Premium Auto
- Mercedes GLA 200 AMG Line Auto
- Mercedes GLA 200 AMG Line D Auto
- Mercedes GLA 200 AMG Line Edition + A
- Mercedes GLA 200 AMG Line Executive A
- Mercedes GLA 200 AMG Line Executive D A
- Mercedes GLA 200 AMG Line Premium + A
- Mercedes GLA 200 AMG Line Premium Auto
- Mercedes GLA 200 AMG Line Premium D A
- Mercedes GLA 200 Sport Auto
- Mercedes GLA 200 Sport D Auto
- Mercedes GLA 200 Sport Executive Auto
- Mercedes GLA 200 Sport Executive D Auto
- Mercedes GLA 220 AMG Line D 4MATIC Auto
- Mercedes GLA 220 AMG Line Prem + D 4M A
- Mercedes GLA 250 Exclsive Ed Prem + E A
- Mercedes GLA 250 Exclusive Ed Prem E A
- Mercedes GLA 250 Exclusive Edition E A
- Mercedes GLB 200 AMG Line Auto
- Mercedes GLB 200 AMG Line Premium + A
- Mercedes GLB 200 AMG Line Premium Auto
- Mercedes GLB 200 AMG Line Premium D A
- Mercedes GLB 220 AMG Line Prem D 4M A
- Mercedes GLC
- Mercedes GLC 300 AMG Line 4MATIC Auto
- Mercedes GLC 300 AMG Line De 4MATIC A
- Mercedes GLC 300 AMG Line Prem + 4M A
- Mercedes GLC 300 AMG Line Prem + D 4M A
- Mercedes GLC 300 AMG Line Prem De 4M A
- Mercedes GLC 300 AMG Line Prem+ E 4M A
- Mercedes GLC 300 AMG Line Premium 4M A
- Mercedes GLC 300 AMG Lne Prem + De 4M A
- Mercedes GLC 300 Sport 4MATIC Auto
- Mercedes GLE
- Mercedes GLE 350 AMG Line De 4MATIC A
- Mercedes GLE 350 AMG Line Prem+ De 4M A
- Mercedes GLS
- Mercedes GLS 400 AMG Line Prem D 4MAT A
- Mercedes GLS 400 AMG LN Prem + D 4MAT A
- Mercedes GLS 400 AMG LN Prem+exe D 4M A
- Mercedes GT
- Mercedes Hymer
- Mercedes ML
- Mercedes ML 250
- Mercedes Motorhome
- Mercedes R-Class
- Mercedes S 350 L Grand Ed Executive D A
- Mercedes S 580 L AMG LN Prem + Exec E A
- Mercedes S-Class
- Mercedes SL
- Mercedes SLC
- Mercedes SLC 300 Final Edition Prem A
- Mercedes SLK
- Mercedes SLS
- Mercedes Sprinter
- Mercedes V
- Mercedes V 220 Sport D Auto
- Mercedes V 300 AMG Line D Auto
- Mercedes Vaneo
- Mercedes Viano
- Mercedes Vito
- Mercedes Vito 110 Progressive CDI
- Mercedes Vito 110 Pure CDI
- Mercedes Vito 114 Progressive CDI
- Mercedes Vito 119 Sport CDI Auto
- Mercedes X
Check a Specific Mercedes
Enter any reg plate to see the individual MOT history, defects found, health score, and running cost estimate for that specific car.