1999 Mercedes Slk230 MOT Pass Rate
Pass rate for Slk230 models manufactured in 1999, based on 136 real MOT test results.
Data from official DVSA MOT testing records
1999 Mercedes Slk230 MOT Analysis
The 1999 Mercedes Slk230 has an MOT pass rate of 58.8% based on 136 tests — slightly below the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 78,526 miles on the odometer. With a 41.2% failure rate, the 1999 Slk230 is rated as "Below Average" for MOT reliability.
The leading cause of MOT failure for the 1999 Mercedes Slk230 is Lamps, reflectors and electrical equipment, responsible for 0.7% of failures. Lighting failures cover all external lights: headlights, tail lights, brake lights, indicators, fog lights, and reflectors. A single blown bulb will cause an MOT fail. This is one of the most preventable failure categories. Typical repair costs range from £5–50. Suspension is the second most common issue at 0.7%.
Top failures specific to 1999 models only. The overall Slk230 page may show different rankings.
What Fails Most
What Fails on This Car?
Click a category to see specific failure items.
View as table
| Rank | Failure Category | Rate (%) | Count |
|---|---|---|---|
| 1 | Lamps, Reflectors And Electrical Equipment | 0.7% | 1 |
| 2 | Suspension | 0.7% | 1 |
Failures per 10,000 Miles
avg. 78,526 miFor every 10,000 miles driven, this shows what percentage of MOT tests fail for each category. This accounts for how far cars are actually driven, not just raw pass/fail counts.
View as table
| Category | Rate / 10K mi | Raw % | Count |
|---|---|---|---|
| Lamps & Electrical | 0.09 | 0.7% | 1 |
| Suspension | 0.09 | 0.7% | 1 |
Mileage Statistics
Mileage-adjusted failure rate — accounts for how much this model year is typically driven.
About This Data
The 1999 Mercedes Slk230 has an MOT pass rate of 58.8% based on 136 tests — slightly below the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 78,526 miles on the odometer. With a 41.2% failure rate, the 1999 Slk230 is rated as "Below Average" for MOT reliability.
If you own or are considering buying a 1999 Mercedes Slk230, budget for potential repairs before each MOT. Before your MOT, pay particular attention to lamps, reflectors and electrical equipment: Walk around the car and check every light — headlights (dipped and main beam), side lights, tail lights, brake lights, indicators, hazard lights, reverse light, rear fog light, and number plate lights. Replace any blown bulbs before the test. At 78,526 average miles, these vehicles are in the mid-range where component wear starts to become a factor.
Lamps, reflectors and electrical equipment — 0.7% of failures
Lamps, reflectors and electrical equipment issues account for 0.7% of MOT failures on 1999 Mercedes Slk230 models. Lighting failures cover all external lights: headlights, tail lights, brake lights, indicators, fog lights, and reflectors. A single blown bulb will cause an MOT fail. This is one of the most preventable failure categories. Typical repair costs: £5–50. Pre-MOT check: Walk around the car and check every light — headlights (dipped and main beam), side lights, tail lights, brake lights, indicators, hazard lights, reverse light, rear fog light, and number plate lights. Replace any blown bulbs before the test.
Suspension — 0.7% of failures
Suspension issues account for 0.7% of MOT failures on 1999 Mercedes Slk230 models. Suspension failures typically involve worn bushes, leaking shock absorbers, broken coil springs, and damaged suspension arms. These affect ride quality, tyre wear, and road holding. Typical repair costs: £200–500. Pre-MOT check: Look for uneven tyre wear, listen for clunking over bumps, and check if the car pulls to one side. A bouncy ride suggests worn shock absorbers. Visually inspect coil springs for cracks.
Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.