There are only three models in the GL range and one trim level - making it simple to know what you're looking at. However, Mercedes offers an extensive list of options and the majority of cars will have several fitted when new. It's worth checking out exactly what extra any potential purchase has - these may be the reason a car looks more expensive than you'd think.
The prestige of the Mercedes-Benz badge, excellent equipment levels, strong engines and a flexible interior means that GL should have no worries on the used market. Models with Mercedes-Benz service history are most sought after. Both diesels are strong, refined and capable of pulling sizeable loads.