MERCEDES C (1991)
Running costs, common problems, and reliability data based on 47 real MOT tests in 2024.
MOT Pass Rate
79%
Total Tests (2024)
47
Avg Mileage
112,139 mi
Est. Annual Cost
£2,397
Is the 1991 MERCEDES C reliable?
Average reliability. Expect some repairs as it ages. That's close to the national average of 82%. It falls below the MERCEDES brand average of 87%.
At 33 years old, 79% of MERCEDES Cs from 1991 passed their MOT first time in 2024. That's based on 47 tests across the UK. The average mileage at this age is 112,139 miles.
How does the 1991 MERCEDES C compare?
Mileage Analysis
The average 1991 MERCEDES C has 112,139 miles on the clock, which is significantly below the expected 244,200 miles for a 33-year-old car. Low-mileage examples may have spent time sitting unused, so check for issues like corroded brakes or perished rubber seals.
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 1991 sits between the two at 79%.
How much does a 1991 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 1991 MERCEDES C
The 1991 MERCEDES C is a large car with a 2299cc petrol engine. 47 of these vehicles were MOT tested in 2024, making it a rare model on UK roads. Among all cars from 1991, the average MOT pass rate is 78%, and this model beats that benchmark.
With an average of 112,139 miles at 33 years old, MERCEDES C owners tend to use this car less than the typical driver. Very low mileage could mean the car has been garaged or used only for short trips, which can cause its own issues like battery drain and moisture buildup.
1991 MERCEDES C Fuel Costs
The 2299cc petrol engine offers a reasonable balance between performance and economy. Expect around 30 mpg in mixed driving, which works out to roughly £1,592 per year at current petrol prices of 142p per litre (based on 7,400 miles per year).
What does it cost to own a 1991 MERCEDES C?
Total estimated annual running cost is £2,397 (£200/month), broken down as £1592 fuel, £250 road tax, £55 MOT, and £500 predicted repairs. Repair costs are moderate, reflecting the 79% pass rate. Keeping on top of servicing will help avoid surprises.
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 1991 MERCEDES C
At 33 years old, the MERCEDES C is firmly in budget territory. Purchase prices are low, but check for rust, worn suspension bushes, and electrical gremlins. A full service history is especially valuable at this age. If you're flexible on year, the 2020 model has the highest pass rate at 92%. Note: with only 47 tests in our data, these figures should be treated as indicative rather than definitive.
Alternatives to the 1991 MERCEDES C
If reliability is your priority, there are 2 similar cars with a higher MOT pass rate. Here are comparable petrol cars with similar engines:
- BMW 3 SERIES (1990) 84% pass rate (+5%) from 3,316 tests
- MERCEDES 190 E (1992) 79% pass rate (same) from 1,492 tests
- SAAB 900 (1993) 73% pass rate (-6%) from 1,312 tests
- FORD ESCORT (1993) 83% pass rate (+4%) from 1,097 tests