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This car has been superseded by a newer model, click here to go to the latest Mercedes-Benz GL-Class (13-15) review.

View all Mercedes-Benz GL-Class reviews
Parkers overall rating: 4 out of 5 4.0

Mercedes-Benz GL-Class running costs aren't great. Residuals - as a percentage - are pretty good, but in real terms, you could still be losing tens of thousands of pounds if you buy new. Going for a used or nearly-new model will save you money but running costs are still fairly high with tyres being especially expensive. The 320 CDI is the most economical but barely averages 29mpg and with a 100-litre tank - one of the biggest around - fill-ups are expensive.

It falls into the top insurance groups and Mercedes-Benz servicing is pricey.

The Mercedes-Benz GL-Class emissions are disappointingly polluting. With an average of 300g/km CO2 across the line-up, its emissions are too high for a large 4x4. The 'greenest' model is the 320 CDI which emits 257g/km of CO2 and averages 29mpg. The 420 CDI emits 307g/km of CO2 and returns 24mpg.

The early 2000s saw a blip in Mercedes-Benz's otherwise faultless reputation for quality, but the company has made changes and the GL is one of the models to benefit from stricter manufacturing standards. Most importantly, it feels like a quality product inside, with excellent materials used throughout and a solid finish. You shouldn't have a lot to worry about regarding Mercedes-Benz GL-Class reliability.

Estimated fuel cost per year

Fuel type Pence per litre Estimated cost per year *
Unleaded 128p £2,771 - £2,909 *
Diesel 131p £1,985 - £2,589 *

* The estimated fuel cost figure is based on an annual mileage of 10,000 miles and is a guide to how much this model will cost in fuel each year. It's calculated using the model's average MPG (calculated from both town centre and motorway driving) and the average fuel price from around the country. Actual fuel costs will vary based on driving style and road conditions.

Highest and lowest CO2 emissions

Engine CO2 emissions Road tax (12 months)
350 CDi (265bhp) Diesel 242 g/km (Min) £555
500 Petrol 322 g/km (Max) £570

Ongoing running costs

Road tax (12 months) £555 - £570
See tax rates for all versions
Insurance group 48 - 50
How much is it to insure?

Vehicle excise duty (VED) varies according to the CO2 emissions and the fuel type of the vehicle. For cars registered before 01 March 2001 it is based on engine size. For cars registered on or after 01 March 2001 the VED or road tax is based on the car's CO2 emissions.