1977 Mercedes 350 MOT Pass Rate
Pass rate for 350 models manufactured in 1977, based on 42 real MOT test results.
Data from official DVSA MOT testing records
1977 Mercedes 350 MOT Analysis
The 1977 Mercedes 350 has an MOT pass rate of 73.8% based on 42 tests — above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 67,900 miles on the odometer. With a 26.2% failure rate, the 1977 350 is rated as "Very Good" for MOT reliability.
The leading cause of MOT failure for the 1977 Mercedes 350 is Registration Plates and VIN, responsible for 7.1% of failures. Registration Plates and VIN issues are a common cause of MOT failure. Regular inspection and maintenance of these components helps ensure your vehicle passes its MOT. Typical repair costs range from £100–400. Exhaust, Fuel and Emissions is the second most common issue at 4.8%. Suspension follows at 2.4%.
Top failures specific to 1977 models only. The overall 350 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 | Registration Plates And Vin | 7.1% | 3 |
| 2 | Exhaust, Fuel And Emissions | 4.8% | 2 |
| 3 | Suspension | 2.4% | 1 |
| 4 | Driver's View Of The Road | 2.4% | 1 |
Failures per 10,000 Miles
avg. 67,900 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 |
|---|---|---|---|
| Registration Plates and VIN | 1.05 | 7.1% | 3 |
| Emissions & Exhaust | 0.70 | 4.8% | 2 |
| Suspension | 0.35 | 2.4% | 1 |
| Visibility | 0.35 | 2.4% | 1 |
Mileage Statistics
Mileage-adjusted failure rate — accounts for how much this model year is typically driven.
About This Data
The 1977 Mercedes 350 has an MOT pass rate of 73.8% based on 42 tests — above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 67,900 miles on the odometer. With a 26.2% failure rate, the 1977 350 is rated as "Very Good" for MOT reliability.
If you own or are considering buying a 1977 Mercedes 350, you can expect reliable MOT performance overall. Before your MOT, pay particular attention to registration plates and vin: Have this system checked during regular servicing. Look for warning signs like unusual noises, vibrations, or dashboard warning lights. At 67,900 average miles, these vehicles are in the mid-range where component wear starts to become a factor.
Registration Plates and VIN — 7.1% of failures
Registration Plates and VIN issues account for 7.1% of MOT failures on 1977 Mercedes 350 models. Registration Plates and VIN issues are a common cause of MOT failure. Regular inspection and maintenance of these components helps ensure your vehicle passes its MOT. Typical repair costs: £100–400. Pre-MOT check: Have this system checked during regular servicing. Look for warning signs like unusual noises, vibrations, or dashboard warning lights.
Exhaust, Fuel and Emissions — 4.8% of failures
Exhaust, Fuel and Emissions issues account for 4.8% of MOT failures on 1977 Mercedes 350 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.
Suspension — 2.4% of failures
Suspension issues account for 2.4% of MOT failures on 1977 Mercedes 350 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.