1988 Mercedes 500 Sec MOT Pass Rate
Pass rate for 500 Sec models manufactured in 1988, based on 461 real MOT test results.
Data from official DVSA MOT testing records
This page shows all 500 Sec cars tested in 1988. Want to see how cars built in 1988 hold up over time?
View 1988 Mercedes 500 Sec vintage page → (69.0% current pass rate)1988 Mercedes 500 Sec MOT Analysis
The 1988 Mercedes 500 Sec has an MOT pass rate of 63.8% based on 461 tests — around the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 136,826 miles on the odometer. With a 36.2% failure rate, the 1988 500 Sec is rated as "Average" for MOT reliability.
The leading cause of MOT failure for the 1988 Mercedes 500 Sec is Brakes, responsible for 0.7% of failures. Brake-related failures include worn brake pads, corroded brake discs, leaking brake lines, and faulty brake servos. These are safety-critical components — any brake deficiency will result in an MOT fail. Typical repair costs range from £150–400. Body, Structure and General Items is the second most common issue at 0.4%. Exhaust, Fuel and Emissions follows at 0.2%.
Top failures specific to 1988 models only. The overall 500 Sec 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 | Brakes | 0.7% | 3 |
| 2 | Body, Structure And General Items | 0.4% | 2 |
| 3 | Exhaust, Fuel And Emissions | 0.2% | 1 |
| 4 | Road Wheels | 0.2% | 1 |
Failures per 10,000 Miles
avg. 136,826 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.
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| Category | Rate / 10K mi | Raw % | Count |
|---|---|---|---|
| Brakes | 0.05 | 0.7% | 3 |
| Body & Structure | 0.03 | 0.4% | 2 |
| Emissions & Exhaust | 0.02 | 0.2% | 1 |
| Wheels | 0.02 | 0.2% | 1 |
Mileage Statistics
Mileage-adjusted failure rate — accounts for how much this model year is typically driven.
About This Data
The 1988 Mercedes 500 Sec has an MOT pass rate of 63.8% based on 461 tests — around the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 136,826 miles on the odometer. With a 36.2% failure rate, the 1988 500 Sec is rated as "Average" for MOT reliability.
If you own or are considering buying a 1988 Mercedes 500 Sec, budget for potential repairs before each MOT. Before your MOT, pay particular attention to brakes: Listen for squealing or grinding noises. Check brake pedal feel — if it feels spongy or goes to the floor, have the system inspected immediately. Look at brake pad thickness through the wheel spokes (minimum 3mm). With an average mileage of 136,826 miles, these vehicles are in the higher-mileage bracket where wear-related failures become more common.
Brakes — 0.7% of failures
Brakes issues account for 0.7% of MOT failures on 1988 Mercedes 500 Sec models. Brake-related failures include worn brake pads, corroded brake discs, leaking brake lines, and faulty brake servos. These are safety-critical components — any brake deficiency will result in an MOT fail. Typical repair costs: £150–400. Pre-MOT check: Listen for squealing or grinding noises. Check brake pedal feel — if it feels spongy or goes to the floor, have the system inspected immediately. Look at brake pad thickness through the wheel spokes (minimum 3mm).
Body, Structure and General Items — 0.4% of failures
Body, Structure and General Items issues account for 0.4% of MOT failures on 1988 Mercedes 500 Sec models. Body and structure failures include excessive corrosion, sharp edges, loose panels, and damage to the vehicle frame. Rust is the primary concern, especially on older vehicles or those exposed to road salt. Typical repair costs: £100–500+. Pre-MOT check: Inspect sills, wheel arches, door bottoms, and the chassis for rust. Surface rust is acceptable but structural corrosion or holes will fail. Check that all doors, bonnet, and boot close securely.
Exhaust, Fuel and Emissions — 0.2% of failures
Exhaust, Fuel and Emissions issues account for 0.2% of MOT failures on 1988 Mercedes 500 Sec models. Emissions failures occur when exhaust gases exceed legal limits for carbon monoxide (CO), hydrocarbons (HC), or particulate matter (diesel). Common causes include faulty oxygen sensors, clogged catalytic converters, or DPF issues on diesel vehicles. Typical repair costs: £100–1,000+. Pre-MOT check: If the engine management light is on, get it diagnosed before the MOT. For diesel cars, ensure the DPF has completed a regeneration cycle. Regular servicing and using premium fuel before the test can help.
Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.