MERCEDES GT (2018)
Running costs, common problems, and reliability data based on 1,190 real MOT tests in 2024.
MOT Pass Rate
98%
Total Tests (2024)
1,190
Avg Mileage
17,639 mi
Est. Annual Cost
£2,037
Is the 2018 MERCEDES GT reliable?
Excellent reliability. Very few MOT failures. That's 16 points above the national average of 82%. It also outperforms the MERCEDES brand average of 87%.
At 6 years old, 98% of MERCEDES GTs from 2018 passed their MOT first time in 2024. That's based on 1,190 tests across the UK. The average mileage at this age is 17,639 miles.
How does the 2018 MERCEDES GT compare?
Mileage Analysis
The average 2018 MERCEDES GT has 17,639 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 MERCEDES GT?
The most reliable year is the 2021 model with a 100% MOT pass rate, while the 2020 model has the lowest at 92%. The 2018 sits between the two at 98%.
How much does a 2018 MERCEDES GT 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.
MERCEDES GT by Year
Checking a specific MERCEDES GT?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 2018 MERCEDES GT
The 2018 MERCEDES GT is a performance with a 3982cc petrol engine. 1,190 of these vehicles were MOT tested in 2024, making it a reasonably common sight on UK roads. It ranks in the top 5% of all 2018 cars for reliability.
With an average of 17,639 miles at 6 years old, MERCEDES GT 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 MERCEDES GT Fuel Costs
The 3982cc petrol engine is on the larger side, so fuel won't be this car's strong point. Expect around 30 mpg in mixed driving, which works out to roughly £1,592 per year at current petrol prices of 142p per litre (based on 7,400 miles per year).
What does it cost to own a 2018 MERCEDES GT?
Total estimated annual running cost is £2,037 (£170/month), broken down as £1592 fuel, £190 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 98% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
MERCEDES GT Reliability Trend
The MERCEDES GT has maintained consistent MOT pass rates across model years, varying by only 0 percentage points.
Buying a Used 2018 MERCEDES GT
At 6 years old, the MERCEDES GT 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 2021 model has the highest pass rate at 100%.
Alternatives to the 2018 MERCEDES GT
The MERCEDES GT is actually the most reliable option among similar petrol performances from this era. Here are comparable petrol cars with similar engines:
- MERCEDES C (2016) 88% pass rate (-10%) from 80,181 tests
- AUDI A6 (2016) 89% pass rate (-9%) from 26,437 tests
- PORSCHE CAYENNE (2019) 95% pass rate (-3%) from 9,063 tests
- PORSCHE 911 (2018) 96% pass rate (-2%) from 7,623 tests