The MERCEDES-BENZ GL (2006-09) GL420 5DR SUV 4.0 CDI AUTO is a large, premium seven-seat SUV, built for space and long-distance comfort rather than city-car convenience. In the UK used market, it sits among heavyweight luxury four-wheel drives, appealing to buyers who need family room, a commanding driving position and the ability to handle varied journeys. mycarcheck.com records 792 look-ups across 278 distinct VINs, showing interest in this GL. Checks indicate a private sale value of £5,400 and recorded mileage of 126,000 miles. Annual mileage averages 5,000, while previous keepers average about five, making careful history and condition checks worthwhile. The GL420's strong diesel engine brings relaxed motorway cruising, generous space and an imposing feel compared with premium rivals. It suits larger families and long-distance drivers, but size and running costs challenge urban use. Consider it for comfort and room, and inspect carefully before buying.