MERCEDES G63 4X4 (2012)
Running costs, reliability data, and common problems from 32 real MOT tests.
Annual Cost
£2,907
£242/month
MOT Pass Rate
75%
Average
Road Tax
£760
Based on CC/year
Insurance
Grp 35-50
5461cc Petrol
Check Carefully
75% pass rate, £2907/year to run. 7 points below average.
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Annual Running Costs
~30 mpg
Based on 5461cc
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT data. Insurance not included.
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Reliability Verdict
Average reliability. Expect some repairs as it ages. That's 7 points below the national average of 82%. It falls below the MERCEDES brand average of 87%.
At 14 years old, 75% of MERCEDES G63 4X4s from 2012 passed their MOT first time in 2026. That's based on 32 tests across the UK. The average mileage at this age is 36,027 miles.
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How Does It Compare?
Mileage Analysis
36,027
Average miles
103,600
Expected for age
The average 2012 MERCEDES G63 4X4 has 36,027 miles on the clock, which is significantly below the expected 103,600 miles for a 14-year-old car. Low-mileage examples may have spent time sitting unused, so check for issues like corroded brakes or perished rubber seals.
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About the 2012 MERCEDES G63 4X4
The 2012 MERCEDES G63 4X4 is a performance with a 5461cc petrol engine. 32 of these vehicles were MOT tested in 2026, making it a rare model on UK roads. It sits in the bottom 83% of 2012 cars for MOT pass rates.
With an average of 36,027 miles at 14 years old, MERCEDES G63 4X4 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.
2012 MERCEDES G63 4X4 Fuel Costs
The 5461cc 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 2012 MERCEDES G63 4X4?
Total estimated annual running cost is £2,907 (£242/month), broken down as £1592 fuel, £760 road tax, £55 MOT, and £500 predicted repairs. Repair costs are moderate, reflecting the 75% pass rate. Keeping on top of servicing will help avoid surprises.
Buying a Used 2012 MERCEDES G63 4X4
At 14 years old, the MERCEDES G63 4X4 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. Note: with only 32 tests in our data, these figures should be treated as indicative rather than definitive.
Common Issues to Watch For
Based on the 2012 MERCEDES G63 4X4's fuel type, age, and engine size, these are the most likely problem areas to check.
Timing Chain / Belt
Watch outAt 14 years old, check whether the timing belt has been replaced (typically due every 5-7 years or 60,000-100,000 miles). A snapped belt can destroy the engine.
Oil Consumption
Medium riskLarger petrol engines can develop higher oil consumption as they age. Check the oil level and look for blue smoke from the exhaust.
Rust and Corrosion
Watch outAt 10+ years, check wheel arches, sills, subframe, and brake lines for rust. Structural corrosion is an MOT failure. Prevention is far cheaper than repair.
Suspension Bushings
Watch outRubber suspension bushes harden and crack with age, causing knocking noises and vague handling. A full refresh costs £300-£800 depending on the car.
Service History
Low riskAlways request a full service history. Regular servicing is the single best indicator of how well a car has been maintained, regardless of mileage.
Running Costs Compared
How the 2012 MERCEDES G63 4X4 stacks up against similar cars for annual running costs, insurance, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Insurance | Total/yr |
|---|---|---|---|---|---|
| MERCEDES G63 4X4(2012) | 75% | £1592 | £760 | Grp 35-50 | £2907 |
| LAND ROVER RANGE ROVER SPORT(2011) | 85% | £1592 | £250 | Grp 35-50 | £2247-£660 |
| MERCEDES SLK(2014) | 87% | £1592 | £250 | Grp 35-50 | £2247-£660 |
| JAGUAR F-TYPE(2014) | 94% | £1592 | £250 | Grp 35-50 | £2097-£810 |
| JAGUAR XK(2014) | 93% | £1592 | £250 | Grp 35-50 | £2097-£810 |
Estimates based on 7,400 miles/year, current fuel prices, and MOT data. Insurance groups are indicative. Actual costs vary by driver, location, and usage.
Related Mercedes Models
Explore other Mercedes cars or similar models in the same category.
MERCEDES A
2019 · 1461cc Diesel
MERCEDES C
2017 · 1991cc Hybrid
MERCEDES A-CLASS
2017 · 1461cc Diesel
LAND ROVER RANGE ROVER SPORT
2011 · 4999cc Petrol
MERCEDES SLK
2014 · 5461cc Petrol
JAGUAR F-TYPE
2014 · 5000cc Petrol
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