Used Mercedes GLS for sale

The Mercedes GLS comes with a full suite of safety kit as standard: multiple airbags, electronic stability control, automatic emergency braking and a 360-degree camera. Some contain technology that stops this high-sided SUV from being affected by crosswinds on the motorway. Modern driver aids include active blind spot assist and an exit-warning function.

Earlier GLS models are often powered by a 3.0-litre V6 diesel, while the latest generation offers a 3.0-litre petrol engine with mild-hybrid technology. Range-topping AMG versions use a 4.0-litre V8 petrol. All engines are paired with a smooth automatic gearbox.

As a luxury SUV with a cockpit-like cabin, you can expect to find dual 12.3-inch screens, satnav, DAB radio, Bluetooth, Apple CarPlay and Android Auto in the GLS. Premium touches like ambient lighting, multi-zone climate control and electrically-adjustable seats are common. Some versions include Harman Kardon sound systems and heads-up displays.

Fuel consumption varies by engine and year. Most diesels get between 27 and 37mpg, while petrol engines average 20 to 27mpg. More powerful AMG and Maybach versions are thirstier (20mpg at best on a good day). It’s not the most efficient SUV, but that's expected for its size and power.

Inspect the bodywork and alloy wheels for scuffs from use – this is a supersized vehicle that's challenging to park. Check all electrical equipment works; pay special attention to the air suspension for leaks or warning lights. Examine the interior for wear and ensure service history is complete. A professional look by The AA Vehicle Inspection can offer extra reassurance.

The GLS is a complex, luxury SUV – more features could mean more potential issues. Mercedes' reliability has improved, yet surveys still place it mid-table among premium brands. Repair costs can be high, but many owners report solid mechanical dependability if time and care are taken over maintenance.