Mercedes GLE W166 (2011–2018) (2011 – 2018)

Reliability score : 7.2/10

The Mercedes GLE W166 is actually the second phase of the third generation of Mercedes-Benz's luxury SUV. Initially launched in 2011 under the ML (W166) designation, it underwent a significant facelift in 2015, adopting the new GLE nomenclature. This model is positioned in the large premium SUV segment, offering a blend of luxury, comfort, on-road capabilities, and, for some versions, off-road performance. It is renowned for its spacious interior, quality materials, and high level of equipment. General reliability is good for a vehicle in this category, but like any complex premium SUV, it presents specific points of attention, particularly concerning electronic systems and sophisticated diesel engines.

✅ Strengths

⚠️ Weaknesses

🎯 Verdict

The Mercedes ML/GLE W166 is an excellent premium SUV, offering undeniable comfort and luxury. Its reliability is generally good, but it is a complex vehicle whose maintenance must not be neglected. The diesel engines, particularly the V6 OM642 (GLE 350 d), are the most recommendable for their driving pleasure, performance, and relatively controlled consumption. However, be vigilant about the maintenance history of the AdBlue system and the oil cooler. The V6 gasoline versions are also good choices for those who drive less or prefer the smoothness of gasoline. The V8 and AMG versions are performance beasts, but their maintenance and consumption costs are very high. The air suspension (Airmatic) is a plus for comfort but a point to watch with age. A clear maintenance history and a thorough inspection before purchase are imperative. If these conditions are met, the GLE W166 remains a relevant choice on the used car market.

Common issues

Fuites du refroidisseur d'huile moteur (OM642) High
🔧 100 000 – 180 000 km
💶 800 – 1 500 €
Vérifier l'historique d'entretien et rechercher des traces d'huile sous le véhicule.
Problèmes du système AdBlue/SCR (capteurs NOx, pompe, réservoir) High
🔧 80 000 – 150 000 km
💶 700 – 1 800 €
S'assurer du bon fonctionnement du système et éviter les alertes AdBlue prolongées.
Défaillance des composants de la suspension pneumatique (Airmatic) High
🔧 100 000 – 180 000 km
💶 800 – 2 000 €
Tester la montée/descente du véhicule et écouter le compresseur d'air.
Encrassement du FAP (Filtre à Particules) Medium
🔧 120 000 – 200 000 km
💶 400 – 1 200 €
Privilégier les longs trajets réguliers pour favoriser la régénération du FAP.
Défaillance du moteur de volets d'admission (swirl flaps) (OM642) Medium
🔧 150 000 – 220 000 km
💶 700 – 1 400 €
Écouter les bruits anormaux et vérifier les codes défauts moteur lors de l'achat.

Estimated maintenance costs

Oil change £160 – 280
Complete brakes £550 – 1 100
Estimated annual budget £900 – 1 800

Indicative estimates (independent garage, UK market). Prices vary by region and year.