MERCEDES SL (1998)
Running costs, common problems, and reliability data based on 2,018 real MOT tests in 2024.
MOT Pass Rate
86%
Total Tests (2024)
2,018
Avg Mileage
89,595 mi
Est. Annual Cost
£2,247
Is the 1998 MERCEDES SL reliable?
Good reliability. Occasional issues but generally solid. That's close to the national average of 82%.
At 26 years old, 86% of MERCEDES SLs from 1998 passed their MOT first time in 2024. That's based on 2,018 tests across the UK. The average mileage at this age is 89,595 miles.
How does the 1998 MERCEDES SL compare?
Mileage Analysis
The average 1998 MERCEDES SL has 89,595 miles on the clock, which is significantly below the expected 192,400 miles for a 26-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 SL?
The most reliable year is the 2019 model with a 97% MOT pass rate, while the 1990 model has the lowest at 81%. The 1998 sits between the two at 86%.
How much does a 1998 MERCEDES SL 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 SL by Year
| Year | Pass Rate | Tests | Avg Mileage |
|---|---|---|---|
| 2019 | 97% | 851 | 19,987 mi |
| 2018 | 93% | 1,022 | 25,750 mi |
| 2017 | 94% | 1,847 | 30,630 mi |
| 2016 | 95% | 2,240 | 36,109 mi |
| 2015 | 92% | 2,222 | 40,591 mi |
| 2014 | 92% | 2,892 | 47,357 mi |
| 2013 | 89% | 2,796 | 49,450 mi |
| 2012 | 90% | 1,136 | 50,476 mi |
| 2011 | 92% | 579 | 50,602 mi |
| 2010 | 88% | 955 | 62,402 mi |
| 2009 | 87% | 1,222 | 63,020 mi |
| 2008 | 90% | 1,940 | 65,610 mi |
| 2007 | 88% | 1,792 | 71,215 mi |
| 2006 | 87% | 1,832 | 73,640 mi |
| 2005 | 88% | 2,430 | 75,394 mi |
| 2004 | 88% | 4,036 | 77,676 mi |
| 2003 | 86% | 5,173 | 75,808 mi |
| 2002 | 88% | 2,083 | 74,421 mi |
| 2001 | 90% | 528 | 78,534 mi |
| 2000 | 86% | 955 | 84,195 mi |
| 1999 | 87% | 1,617 | 84,924 mi |
| 1998 | 86% | 2,018 | 89,595 mi |
| 1997 | 87% | 2,117 | 93,418 mi |
| 1996 | 88% | 1,778 | 93,971 mi |
| 1995 | 85% | 1,627 | 99,248 mi |
| 1994 | 88% | 1,244 | 93,271 mi |
| 1993 | 88% | 462 | 85,167 mi |
| 1992 | 87% | 312 | 90,571 mi |
| 1991 | 86% | 288 | 78,703 mi |
| 1990 | 81% | 186 | 88,429 mi |
Checking a specific MERCEDES SL?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 1998 MERCEDES SL
The 1998 MERCEDES SL is a performance with a 4973cc petrol engine. 2,018 of these vehicles were MOT tested in 2024, making it a reasonably common sight on UK roads. It ranks in the top 14% of all 1998 cars for reliability.
With an average of 89,595 miles at 26 years old, MERCEDES SL 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.
1998 MERCEDES SL Fuel Costs
The 4973cc petrol engine is on the larger side, so fuel won't be this car's strong point. 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 1998 MERCEDES SL?
Total estimated annual running cost is £2,247 (£187/month), broken down as £1592 fuel, £250 road tax, £55 MOT, and £350 predicted repairs. Repair costs are moderate, reflecting the 86% pass rate. Keeping on top of servicing will help avoid surprises.
MERCEDES SL Reliability Trend
Newer MERCEDES SLs show better MOT pass rates than older ones, with an average improvement of 4 percentage points.
Buying a Used 1998 MERCEDES SL
At 26 years old, the MERCEDES SL 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 2019 model has the highest pass rate at 97%.
Alternatives to the 1998 MERCEDES SL
If reliability is your priority, there's one similar car with a higher MOT pass rate. Here are comparable petrol cars with similar engines:
- MERCEDES CLK (2000) 81% pass rate (-5%) from 2,099 tests
- TVR CHIMAERA (1999) 88% pass rate (+2%) from 1,468 tests
- TOYOTA LAND CRUISER (1998) 78% pass rate (-8%) from 1,301 tests
- BMW M5 (2000) 85% pass rate (-1%) from 359 tests