DETHLEFFS UNCLASSIFIED (2018)
Running costs, common problems, and reliability data based on 36 real MOT tests in 2024.
MOT Pass Rate
94%
Total Tests (2024)
36
Avg Mileage
16,665 mi
Est. Annual Cost
£1,690
Is the 2018 DETHLEFFS UNCLASSIFIED reliable?
Excellent reliability. Very few MOT failures. That's 12 points above the national average of 82%. It also outperforms the DETHLEFFS brand average of 90%.
At 6 years old, 94% of DETHLEFFS UNCLASSIFIEDs from 2018 passed their MOT first time in 2024. That's based on 36 tests across the UK. The average mileage at this age is 16,665 miles.
How does the 2018 DETHLEFFS UNCLASSIFIED compare?
Mileage Analysis
The average 2018 DETHLEFFS UNCLASSIFIED has 16,665 miles on the clock, which is significantly below the expected 44,400 miles for a 6-year-old car. Low-mileage examples may have spent time sitting unused, so check for issues like corroded brakes or perished rubber seals.
Best year to buy a DETHLEFFS UNCLASSIFIED?
The most reliable year is the 2019 model with a 99% MOT pass rate, while the 2020 model has the lowest at 99%. The 2018 sits between the two at 94%.
How much does a 2018 DETHLEFFS UNCLASSIFIED 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.
DETHLEFFS UNCLASSIFIED by Year
Checking a specific DETHLEFFS UNCLASSIFIED?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 2018 DETHLEFFS UNCLASSIFIED
The 2018 DETHLEFFS UNCLASSIFIED is a large car with a 2998cc diesel engine. 36 of these vehicles were MOT tested in 2024, making it a rare model on UK roads. It ranks in the top 25% of all 2018 cars for reliability.
With an average of 16,665 miles at 6 years old, DETHLEFFS UNCLASSIFIED 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.
2018 DETHLEFFS UNCLASSIFIED Fuel Costs
The 2998cc diesel engine is on the larger side, so fuel won't be this car's strong point. Expect around 40 mpg in mixed driving, which works out to roughly £1,245 per year at current diesel prices of 148p per litre (based on 7,400 miles per year). Diesel cars of this age should have their DPF (diesel particulate filter) checked, as replacements can be costly.
What does it cost to own a 2018 DETHLEFFS UNCLASSIFIED?
Total estimated annual running cost is £1,690 (£141/month), broken down as £1245 fuel, £190 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 2018 DETHLEFFS UNCLASSIFIED
At 6 years old, the DETHLEFFS UNCLASSIFIED offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost. If you're flexible on year, the 2019 model has the highest pass rate at 99%. Note: with only 36 tests in our data, these figures should be treated as indicative rather than definitive.
Alternatives to the 2018 DETHLEFFS UNCLASSIFIED
The DETHLEFFS UNCLASSIFIED is actually the most reliable option among similar diesel large cars from this era. Here are comparable diesel cars with similar engines:
- MERCEDES E (2019) 90% pass rate (-4%) from 41,000 tests
- MERCEDES GLC (2018) 91% pass rate (-3%) from 40,494 tests
- AUDI A5 (2017) 89% pass rate (-5%) from 33,531 tests
- FORD RANGER (2019) 87% pass rate (-7%) from 32,194 tests