There will be few buyers for the V8-engined Mercedes GL. It is swift, but the base price of over £73,000 is well into Range Rover territory, which may be a step too far for a relatively unglamorous, if hugely practical, vehicle. The V8 is ranked at 15mpg in town and just 20.8mpg on the combined cycle. The CO2 rating is 317g/km. The final nail in the V8s fiscal coffin is the retained value of just 30 per cent over three years.
The best argument for the diesel engine is its superior economy. No GL weighs less than 2.45 tonnes, so the fact that the diesel version has an official EU combined figure of 30.7mpg, an urban figure of 24.4mpg and a CO2 rating of 242g/km is relatively impressive. Retained value is much better, at 42 percent over three years.
Both cars will be expensive to insure, with the V8 in the high category of 50 and the 350 CDI in at group 49. The V8 gets an ‘M’ road tax band rating and the diesel is in the L band.