MERCEDES G-CLASS (1999)
Running costs, common problems, and reliability data based on 44 real MOT tests in 2024.
MOT Pass Rate
82%
Total Tests (2024)
44
Avg Mileage
113,541 mi
Est. Annual Cost
£2,247
Is the 1999 MERCEDES G-CLASS reliable?
Good reliability. Occasional issues but generally solid. That's close to the national average of 82%. It falls below the MERCEDES brand average of 87%.
At 25 years old, 82% of MERCEDES G-CLASSs from 1999 passed their MOT first time in 2024. That's based on 44 tests across the UK. The average mileage at this age is 113,541 miles.
How does the 1999 MERCEDES G-CLASS compare?
Mileage Analysis
The average 1999 MERCEDES G-CLASS has 113,541 miles on the clock, which is below the expected 185,000 miles for a 25-year-old car. This suggests lighter use than average, which generally means less wear on major components.
Best year to buy a MERCEDES G-CLASS?
The most reliable year is the 2020 model with a 98% MOT pass rate, while the 2021 model has the lowest at 78%. The 1999 sits between the two at 82%.
How much does a 1999 MERCEDES G-CLASS 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 G-CLASS by Year
| Year | Pass Rate | Tests | Avg Mileage |
|---|---|---|---|
| 2021 | 78% | 65 | 30,190 mi |
| 2020 | 98% | 66 | 32,570 mi |
| 2019 | 96% | 319 | 41,698 mi |
| 2018 | 94% | 807 | 39,199 mi |
| 2017 | 86% | 691 | 43,730 mi |
| 2016 | 94% | 604 | 58,012 mi |
| 2015 | 88% | 591 | 48,991 mi |
| 2014 | 92% | 362 | 54,969 mi |
| 2013 | 94% | 449 | 69,675 mi |
| 2012 | 90% | 221 | 76,209 mi |
| 2011 | 96% | 92 | 70,666 mi |
| 2010 | 73% | 33 | 78,145 mi |
| 2007 | 100% | 35 | 103,461 mi |
| 2001 | 60% | 42 | 93,234 mi |
| 1999 | 82% | 44 | 113,541 mi |
Checking a specific MERCEDES G-CLASS?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 1999 MERCEDES G-CLASS
The 1999 MERCEDES G-CLASS is a performance with a 4966cc petrol engine. 44 of these vehicles were MOT tested in 2024, making it a rare model on UK roads. Among all cars from 1999, the average MOT pass rate is 75%, and this model beats that benchmark.
With an average of 113,541 miles at 25 years old, MERCEDES G-CLASS owners tend to use this car less than the typical driver.
1999 MERCEDES G-CLASS Fuel Costs
The 4966cc 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 1999 MERCEDES G-CLASS?
Total estimated annual running cost is £2,247 (£187/month), broken down as £1592 fuel, £250 road tax, £55 MOT, and £350 predicted repairs. Repair costs are moderate, reflecting the 82% pass rate. Keeping on top of servicing will help avoid surprises.
MERCEDES G-CLASS Reliability Trend
The MERCEDES G-CLASS has maintained consistent MOT pass rates across model years, varying by only 1 percentage points.
Buying a Used 1999 MERCEDES G-CLASS
At 25 years old, the MERCEDES G-CLASS is firmly in budget territory. Purchase prices are low, but check for rust, worn suspension bushes, and electrical gremlins. A full service history is especially valuable at this age. If you're flexible on year, the 2020 model has the highest pass rate at 98%. Note: with only 44 tests in our data, these figures should be treated as indicative rather than definitive.
Alternatives to the 1999 MERCEDES G-CLASS
If reliability is your priority, there are 2 similar cars with a higher MOT pass rate. Here are comparable petrol cars with similar engines:
- MERCEDES SL (1997) 87% pass rate (+5%) from 2,117 tests
- MERCEDES CLK (2000) 81% pass rate (-1%) from 2,099 tests
- TVR CHIMAERA (1999) 88% pass rate (+6%) from 1,468 tests
- TOYOTA LAND CRUISER (1998) 78% pass rate (-4%) from 1,301 tests