MERCEDES C (2018)
Running costs, common problems, and reliability data based on 62,138 real MOT tests in 2024.
MOT Pass Rate
90%
Total Tests (2024)
62,138
Avg Mileage
51,166 mi
Est. Annual Cost
£1,772
Is the 2018 MERCEDES C reliable?
Excellent reliability. Very few MOT failures. That's 8 points above the national average of 82%.
At 6 years old, 90% of MERCEDES Cs from 2018 passed their MOT first time in 2024. That's based on 62,138 tests across the UK. The average mileage at this age is 51,166 miles.
How does the 2018 MERCEDES C compare?
Mileage Analysis
The average 2018 MERCEDES C has 51,166 miles on the clock, which is in line with the expected 44,400 miles for a 6-year-old car, suggesting normal everyday use.
Best year to buy a MERCEDES C?
The most reliable year is the 2020 model with a 92% MOT pass rate, while the 2004 model has the lowest at 72%. The 2018 sits between the two at 90%.
How much does a 2018 MERCEDES C cost to run?
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT pass rate data. Insurance not included.
MERCEDES C by Year
| Year | Pass Rate | Tests | Avg Mileage |
|---|---|---|---|
| 2021 | 92% | 3,772 | 27,184 mi |
| 2020 | 92% | 16,225 | 33,734 mi |
| 2019 | 91% | 52,838 | 40,700 mi |
| 2018 | 90% | 62,138 | 51,166 mi |
| 2017 | 89% | 87,612 | 60,957 mi |
| 2016 | 88% | 80,181 | 73,695 mi |
| 2015 | 86% | 71,635 | 85,216 mi |
| 2014 | 85% | 54,729 | 90,129 mi |
| 2013 | 81% | 51,703 | 97,102 mi |
| 2012 | 79% | 59,235 | 102,461 mi |
| 2011 | 79% | 42,676 | 109,800 mi |
| 2010 | 78% | 28,538 | 111,322 mi |
| 2009 | 77% | 28,440 | 118,861 mi |
| 2008 | 77% | 30,369 | 121,672 mi |
| 2007 | 76% | 25,544 | 119,028 mi |
| 2006 | 74% | 20,205 | 118,301 mi |
| 2005 | 73% | 17,978 | 121,824 mi |
| 2004 | 72% | 13,493 | 116,683 mi |
| 2003 | 73% | 9,158 | 112,103 mi |
| 2002 | 75% | 4,985 | 103,944 mi |
| 2001 | 75% | 2,463 | 101,994 mi |
| 2000 | 77% | 1,103 | 104,741 mi |
| 1999 | 82% | 2,683 | 110,180 mi |
| 1998 | 79% | 2,916 | 112,877 mi |
| 1997 | 81% | 2,336 | 121,767 mi |
| 1996 | 82% | 1,296 | 107,809 mi |
| 1995 | 83% | 1,017 | 101,913 mi |
| 1994 | 84% | 735 | 103,968 mi |
| 1993 | 82% | 71 | 105,975 mi |
| 1992 | 87% | 30 | 131,044 mi |
| 1991 | 79% | 47 | 112,139 mi |
| 1990 | 66% | 41 | 103,332 mi |
Checking a specific MERCEDES C?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 2018 MERCEDES C
The 2018 MERCEDES C is a family car with a 1991cc hybrid engine. 62,138 of these vehicles were MOT tested in 2024, making it one of the most commonly tested cars on UK roads. Among all cars from 2018, the average MOT pass rate is 89%, and this model beats that benchmark.
With an average of 51,166 miles at 6 years old, MERCEDES C owners drive about as much as the UK average.
2018 MERCEDES C Fuel Costs
The 1991cc hybrid engine offers a reasonable balance between performance and economy. Expect around 36 mpg in mixed driving, which works out to roughly £1,327 per year at current hybrid prices of 142p per litre (based on 7,400 miles per year). As a hybrid, real-world fuel costs will vary significantly depending on how much electric-only driving you do.
What does it cost to own a 2018 MERCEDES C?
Total estimated annual running cost is £1,772 (£148/month), broken down as £1327 fuel, £190 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 90% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
MERCEDES C Reliability Trend
Newer MERCEDES Cs show better MOT pass rates than older ones, with an average improvement of 6 percentage points.
Buying a Used 2018 MERCEDES C
At 6 years old, the MERCEDES C offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost. If you're flexible on year, the 2020 model has the highest pass rate at 92%. With 62,138 MOT tests in our data, there's strong statistical confidence in these figures.
Alternatives to the 2018 MERCEDES C
If reliability is your priority, there are 3 similar cars with a higher MOT pass rate. Here are comparable hybrid cars with similar engines:
- TOYOTA YARIS (2019) 93% pass rate (+3%) from 41,554 tests
- MINI COOPER S (2019) 92% pass rate (+2%) from 33,682 tests
- LAND ROVER RANGE ROVER SPORT (2019) 94% pass rate (+4%) from 33,069 tests
- TOYOTA C-HR (2018) 90% pass rate (same) from 31,950 tests