Mercedes-Benz GLE (W166) Problems by Year
The first-generation Mercedes-Benz GLE (W166) is essentially a heavily facelifted third-generation M-Class, serving as a capable, comfortable, and imposing large SUV. Positioned against the BMW X5, it prioritizes a plush ride and luxurious cruising over sporty handling, making it highly popular in the UK for towing and family duties. It is mechanically robust, utilizing proven Mercedes powertrains, but its sheer size means running costs for tyres and brakes are high. Airmatic suspension leaks, diesel emissions hardware, and the 7G-Tronic gearbox are the main watch-outs, suiting buyers who want traditional Mercedes comfort in a commanding package.
Select a year below to see the specific problems affecting that model year, with estimated repair costs and severity ratings.
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Browse Mercedes-Benz GLE (W166) in our Directory
View MOT history, registration data, and reliability scores for the Mercedes-Benz Mercedes-Benz GLE (W166).
View Mercedes-Benz GLE (W166) DirectoryBuying Tips for the Mercedes-Benz GLE (W166)
- ✓Thoroughly inspect the Airmatic air suspension; listen for the compressor running constantly and ensure the car doesn't sag when parked.
- ✓Check the OM642 V6 diesel engine for oil cooler leaks in the V-valley, which requires significant dismantling to fix.
- ✓Test the 7G-Tronic or 9G-Tronic gearbox for smooth shifting, and verify that the fluid has been changed according to the schedule.
- ✓Inspect the AdBlue system on diesel models; a 'starts remaining' warning on the dash points to failing NOx sensors or the AdBlue heater.
- ✓Check the condition of the massive brake discs and tyres, as stopping a 2.2-tonne SUV wears them out quickly and replacements are costly.
- ✓Look for water ingress in the rear SAM unit (located in the boot), usually caused by leaking rear light seals, which can cause chaotic electrical faults.