Mercedes CLA C117 (2013–2019) (2013 – 2019)

Reliability score : 7.6/10

The Mercedes-Benz CLA (C117 generation) was launched in 2013 as a '4-door coupé' derived from the A-Class (W176), based on the MFA front-wheel-drive platform. It stands out with its flowing design, record aerodynamics (Cd of 0.22), and frameless doors. A facelift occurred in 2016, bringing standard LED lights, new bumpers, a refined infotainment screen, and a slight improvement in perceived interior quality. Although aesthetically very appealing, it sacrifices rear spaciousness and visibility for style. Mechanically, this report focuses on the diesel offering (very popular in Europe for high-mileage drivers), shared between the 1.5L Renault-sourced engine (OM607) and the 2.1L 100% Mercedes engine (OM651), while also providing an exhaustive overview of global gasoline engines.

✅ Strengths

Spectacular and timeless exterior design (mini-CLS)
Exceptional aerodynamics (Cd 0.22) reducing wind noise at high speed and fuel consumption
Very low fuel consumption for diesel engines (especially the 180d)
Safe and dynamic road handling
Improved finish quality after the 2016 facelift

⚠️ Weaknesses

Very restricted rear spaciousness (headroom penalizing for adults)
Poor rear and three-quarter rear visibility
7G-DCT gearbox sometimes causes jerks at low speed or during maneuvers
Parasitic noises in the cabin on pre-facelift models (2013-2015)
High maintenance cost in the Mercedes network, especially for chain replacement on the OM651 engine

🎯 Verdict

The Mercedes CLA C117 is an 'emotional purchase' that prioritizes style over practicality. For diesel engines, the choice depends on your usage. The CLA 180 d (Renault engine) is paradoxically the most rational and reliable choice for daily and economical use, provided the belt change is respected. The CLA 200 d / 220 d (Mercedes OM651 engine) offers better performance for high-mileage highway drivers but requires absolute vigilance regarding the maintenance of its timing chain and the 7G-DCT gearbox. Opt for a facelifted model (post-2016) for better assembly quality and more reliable electronics.

Common issues

Défaillance des injecteurs (moteur OM651) High

🔧 80 000 – 150 000 km

💶 800 – 1 500 €

Vérifier l'historique d'entretien, écouter le moteur au ralenti, attention aux fumées.

Encrassement ou défaillance de la vanne EGR Medium

🔧 100 000 – 180 000 km

💶 400 – 800 €

Privilégier les longs trajets, vérifier l'historique de nettoyage/remplacement.

Problèmes de capteur NOx ou du système AdBlue Medium

🔧 120 000 – 200 000 km

💶 600 – 1 500 €

S'assurer que le système AdBlue a été correctement entretenu et rempli.

Colmatage ou défaillance du filtre à particules (FAP) Medium

🔧 100 000 – 200 000 km

💶 800 – 2 000 €

Éviter les trajets courts fréquents, vérifier l'historique de régénération.

Dysfonctionnement de la boîte de vitesses 7G-DCT (mécatronique/embrayages) High

🔧 120 000 – 200 000 km

💶 1 500 – 4 000 €

Tester la boîte à froid et à chaud, vérifier les vidanges de boîte régulières.

Estimated maintenance costs

Oil change	£100 – 180
Timing chain	£1 300 – 2 200
Clutch	£1 400 – 2 400
Complete brakes	£300 – 600
Estimated annual budget	£650 – 1 300

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