Mercedes EQS I (V297) (2021 – 2024)

Reliability score : 8.3/10

The EQS (code name V297) is the 100% electric flagship of Mercedes-Benz, the zero-emission equivalent of the S-Class. Based on the dedicated EVA2 platform, it stands out with its 'One-Bow' design dictated by aerodynamics, giving it a record drag coefficient (Cx) of 0.20. Inside, it introduces the impressive (and optional) MBUX Hyperscreen, a glass panel covering the entire dashboard. Although the mechanical reliability of the electric motors is excellent, this ultra-technological model is prone to software bugs and a dizzying depreciation on the used market. Overall design rating: 8.5/10 - An impressive technological showcase, but its software complexity requires rigorous monitoring.

✅ Strengths

Exceptional real-world range (especially on the 450+ version)
Absolute benchmark ride comfort and soundproofing
Record aerodynamics (Cx 0.20) favoring highway efficiency
Rear-wheel steering (up to 10°) making this land yacht very maneuverable in the city
Onboard technology and the 'Wow' effect of the Hyperscreen

⚠️ Weaknesses

Colossal depreciation on the used market
Very artificial and confusing brake pedal feel
Excessive weight (over 2.5 tons) penalizing agility
Rear headroom limited by the sloping roofline
Frequent software bugs on early model years (MBUX)

🎯 Verdict

The EQS is an engineering feat focused on absolute comfort and aerodynamic efficiency. Mechanically, the electric motors and batteries prove to be very reliable. However, its Achilles heel lies in its software complexity (MBUX bugs) and brutal financial depreciation. It is strongly advised against buying it new. Used, it is an exceptional deal for anyone looking for an ultra-luxury electric cruiser at a fraction of its original price. Favor the 450+ version for its unbeatable range and greater simplicity (RWD).

Common issues

Dysfonctionnements du système d'infodivertissement MBUX (lenteurs, bugs logiciels) Medium

🔧 Dès l'acquisition – 50 000 km

💶 0 – 2 000 € (souvent résolu par mise à jour, sinon remplacement module)

Vérifier les mises à jour logicielles et la réactivité du système avant achat.

Défaillance prématurée de la batterie 12V auxiliaire Medium

🔧 20 000 – 60 000 km

💶 200 – 400 €

Faire contrôler la batterie 12V lors des entretiens réguliers.

Problèmes avec le système de climatisation (HVAC) Medium

🔧 30 000 – 80 000 km

💶 400 – 1 500 €

Tester le chauffage et la climatisation sur toutes les fonctions.

Dysfonctionnements des capteurs d'aide à la conduite ou équipements électriques (poignées affleurantes, vitres) Low

🔧 Dès l'acquisition – 70 000 km

💶 300 – 1 000 €

Vérifier le bon fonctionnement de tous les capteurs et équipements électriques.

Estimated maintenance costs

Complete brakes	£280 – 580
Estimated annual budget	£500 – 1 000

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