1978 Mercedes-Benz 450 MOT Pass Rate
Pass rate for 450 models manufactured in 1978, based on 159 real MOT test results.
Data from official DVSA MOT testing records
This page shows all 450 cars tested in 1978. Want to see how cars built in 1978 hold up over time?
View 1978 Mercedes-Benz 450 vintage page → (57.4% current pass rate)1978 Mercedes-Benz 450 MOT Analysis
The 1978 Mercedes-Benz 450 has an MOT pass rate of 71.7% based on 159 tests — above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 97,225 miles on the odometer. With a 28.3% failure rate, the 1978 450 is rated as "Very Good" for MOT reliability.
The leading cause of MOT failure for the 1978 Mercedes-Benz 450 is Lamps, reflectors and electrical equipment, responsible for 1.9% 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 1.9%.
Top failures specific to 1978 models only. The overall 450 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 | 1.9% | 3 |
| 2 | Suspension | 1.9% | 3 |
Failures per 10,000 Miles
avg. 97,225 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 | 0.19 | 1.9% | 3 |
| Suspension | 0.19 | 1.9% | 3 |
Mileage Statistics
Mileage-adjusted failure rate — accounts for how much this model year is typically driven.
About This Data
The 1978 Mercedes-Benz 450 has an MOT pass rate of 71.7% based on 159 tests — above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 97,225 miles on the odometer. With a 28.3% failure rate, the 1978 450 is rated as "Very Good" for MOT reliability.
If you own or are considering buying a 1978 Mercedes-Benz 450, you can expect reliable MOT performance overall. 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. With an average mileage of 97,225 miles, these vehicles are in the higher-mileage bracket where wear-related failures become more common.
Lamps, reflectors and electrical equipment — 1.9% of failures
Lamps, reflectors and electrical equipment issues account for 1.9% of MOT failures on 1978 Mercedes-Benz 450 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 — 1.9% of failures
Suspension issues account for 1.9% of MOT failures on 1978 Mercedes-Benz 450 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.