Mercedes Classe A W177 (2018 – 2025)

Reliability score : 7.8/10

The fourth-generation Mercedes-Benz A-Class (W177 for the compact hatchback, V177 for the sedan, Z177 for the Chinese long-wheelbase version) marks a major technological turning point for the star brand. Based on the MFA2 platform, it introduced the MBUX dual-screen infotainment system, redefining premium segment standards. While the visual presentation is spectacular, the first model years (2018-2019) suffered from early defects (electronic bugs, cabin rattles). The late 2022 facelift corrected most of these shortcomings, simplified the engine range (widespread adoption of 48V mild-hybridization on petrol engines), and improved perceived quality. Mechanically, the petrol engines (partially developed with the Renault-Nissan Alliance for the 1.3L) are generally reliable, although the 2.0L h

✅ Strengths

MBUX system still at the top of its class (responsiveness, voice control)
Very successful, economical, and reliable 1.3L petrol engine (M282)
Dynamic and safe road handling
Very appealing and aerodynamic exterior design
Excellent electric range on the A 250 e plug-in hybrid version

⚠️ Weaknesses

Disappointing interior assembly quality on 2018-2019 models (parasitic noises)
Dual-clutch gearbox sometimes harsh at low speeds
Poor rear visibility
Very high purchase prices and maintenance costs within the Mercedes network
Costly cylinder head issue on early 2.0L petrol engines (A 220 / A 250)

🎯 Verdict

The Mercedes A-Class W177 is a highly technological compact car that has managed to make its predecessors' dynamic shortcomings forgotten. If you are targeting a petrol engine, the 1.3L unit (A 180, A 200) is the most rational and reliable choice, the result of a successful collaboration with Renault. However, caution is advised for 2.0L versions (A 220, A 250) from before 2021 due to proven weaknesses in the cylinder head. Models produced from 2020 onwards, and especially the facelifted versions (late 2022), are largely preferable as they have been purged of most of their electronic bugs and assembly defects. Purchase is recommended, provided a clear service history exclusive to the manufacturer's network is demanded.

Common issues

Glitches et bugs du système d'infodivertissement MBUX Low

🔧 Dès le début de vie du véhicule

💶 0 € (mise à jour logicielle) – 1 500 € (remplacement module si hardware)

Vérifier l'historique des mises à jour logicielles et tester toutes les fonctions.

Bruits ou usure prématurée des composants de suspension (silent-blocs, amortisseurs) Medium

🔧 50 000 – 100 000 km

💶 400 – 1 000 €

Tester la voiture sur routes variées, écouter les bruits et vérifier l'état des pneus.

Problèmes de capteurs ou alertes électroniques mineures (ex: capteur ABS, pression pneus) Low

🔧 40 000 – 80 000 km

💶 150 – 400 €

Faire un diagnostic électronique pour vérifier les codes défauts enregistrés.

Dysfonctionnements de la boîte automatique à double embrayage (DCT) High

🔧 80 000 – 150 000 km

💶 2 500 – 5 000 €

Tester les passages de vitesses à froid et à chaud, vérifier l'historique d'entretien de la boîte.

Estimated maintenance costs

Oil change	£100 – 180
Timing chain	£1,200 – 2,500 (si remplacement nécessaire, non planifié)
Clutch	£850 – 1,500 (pour boîte manuelle)
Complete brakes	£300 – 650
Estimated annual budget	£650 – 1,300

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