MERCEDES S 430 (1999)
Running costs, common problems, and reliability data based on 51 real MOT tests in 2024.
MOT Pass Rate
94%
Total Tests (2024)
51
Avg Mileage
79,402 mi
Est. Annual Cost
£2,097
Is the 1999 MERCEDES S 430 reliable?
Excellent reliability. Very few MOT failures. That's 12 points above the national average of 82%. It also outperforms the MERCEDES brand average of 87%.
At 25 years old, 94% of MERCEDES S 430s from 1999 passed their MOT first time in 2024. That's based on 51 tests across the UK. The average mileage at this age is 79,402 miles.
How does the 1999 MERCEDES S 430 compare?
Mileage Analysis
The average 1999 MERCEDES S 430 has 79,402 miles on the clock, which is significantly below the expected 185,000 miles for a 25-year-old car. Low-mileage examples may have spent time sitting unused, so check for issues like corroded brakes or perished rubber seals.
How much does a 1999 MERCEDES S 430 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.
Checking a specific MERCEDES S 430?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 1999 MERCEDES S 430
The 1999 MERCEDES S 430 is a performance with a 4266cc petrol engine. 51 of these vehicles were MOT tested in 2024, making it a rare model on UK roads. It ranks in the top 4% of all 1999 cars for reliability.
With an average of 79,402 miles at 25 years old, MERCEDES S 430 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.
1999 MERCEDES S 430 Fuel Costs
The 4266cc 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 1999 MERCEDES S 430?
Total estimated annual running cost is £2,097 (£175/month), broken down as £1592 fuel, £250 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 94% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
Buying a Used 1999 MERCEDES S 430
At 25 years old, the MERCEDES S 430 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. Note: with only 51 tests in our data, these figures should be treated as indicative rather than definitive.
Alternatives to the 1999 MERCEDES S 430
The MERCEDES S 430 is actually the most reliable option among similar petrol performances from this era. Here are comparable petrol cars with similar engines:
- JAGUAR XK8 (1997) 81% pass rate (-13%) from 3,443 tests
- LAND ROVER RANGE ROVER (2001) 80% pass rate (-14%) from 2,198 tests
- JAGUAR XJ (1998) 77% pass rate (-17%) from 2,154 tests
- PORSCHE 911 (1997) 90% pass rate (-4%) from 2,103 tests