Mercedes GLC X253 (2015 – 2023)

Reliability score : 7.8/10

The Mercedes-Benz GLC (X253 Generation / C253 for the Coupé) succeeded the GLK in 2015. Based on the C-Class (W205) MRA platform, it marked a complete stylistic break from its predecessor, adopting fluid lines and a luxurious interior. Becoming the brand's global best-seller, it benefited from a major restyling (facelift) in 2019, introducing the MBUX infotainment system, new driving aids, and a complete overhaul of its engine range (transition from M274/OM651 blocks to M264/OM654 with 48V mild hybridization). Although generally well-designed, the first model years (2015-2018) require particular vigilance, especially regarding the M274 petrol engines and the air suspension.

✅ Strengths

Exceptional ride comfort (especially with air suspension)
Interior finish quality and sound insulation
Highly performing MBUX multimedia system (post-2019)
Excellent 9G-Tronic automatic gearbox (once updated)
Wide choice of engines (Petrol, Diesel, PHEV, AMG)

⚠️ Weaknesses

Variable reliability of M274 petrol engines (2015-2018)
Very high maintenance and spare parts cost
Expensive to repair air suspension (Air Body Control)
Cracking of center console plastics (especially pre-2019)
High weight penalizing agility and consumption (especially PHEV)

🎯 Verdict

The Mercedes GLC X253 is an extremely well-rounded premium SUV, offering undeniable comfort and status. If you are targeting a petrol engine, absolutely prioritize a facelifted (post-2019) model equipped with the M264 engine (GLC 200 or 300). Pre-2019 petrol models (M274) present a significant mechanical risk (piston pin) which can be very expensive. For sportiness enthusiasts, the GLC 43 AMG (V6) is an excellent compromise, offering superior reliability to the 63 AMG's V8 while maintaining (relatively) reasonable running costs. Avoid air suspension if you are buying a high-mileage model without a warranty.

Common issues

Problèmes de chaîne de distribution ou de tendeur (moteur M274) High

🔧 100 000 – 180 000 km

💶 1 500 – 3 000 €

Écouter les bruits de cliquetis au démarrage à froid, surtout sur les 200/250/300 essence.

Fuites d'huile moteur (moteur M274, souvent joints d'arbre à cames ou couvre-culasse) Medium

🔧 60 000 – 120 000 km

💶 400 – 900 €

Vérifier régulièrement le niveau d'huile et les traces sous le véhicule.

Dysfonctionnements du système de suspension Airmatic (si équipé) High

🔧 80 000 – 150 000 km

💶 1 000 – 2 500 € par essieu (compresseur ou amortisseur)

Tester le fonctionnement de la suspension, vérifier l'assiette du véhicule à l'arrêt.

Problèmes électroniques / système d'infodivertissement (COMAND/MBUX) Medium

🔧 Variable, dès 40 000 km

💶 300 – 1 200 € (mise à jour logicielle, remplacement module)

Tester toutes les fonctions électroniques et l'écran tactile avant l'achat.

Estimated maintenance costs

Oil change	£100 – 180
Complete brakes	£500 – 850
Estimated annual budget	£650 – 1 300

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