Mercedes Classe S W223 (2020 – 2025)

Reliability score : 8.4/10

The Mercedes-Benz S-Class (W223 generation) represents the pinnacle of luxury and technology within the brand with the star. Launched at the end of 2020, it marks a major technological breakthrough with the introduction of the MBUX 2.0 system, a huge central OLED screen, flush door handles, and rear-wheel steering (up to 10 degrees). Although the industry is shifting towards electric (a role assigned to the EQS), the W223 retains a very high-level combustion engine offering. The diesel engine (OM656 inline 6-cylinder) holds a prominent place, particularly in Europe, offering remarkable smoothness, massive torque, and formidable efficiency for high-mileage drivers, making this limousine capable of crossing Europe on a single tank of fuel. While the mechanicals are robust, the onboard electr

✅ Strengths

Exceptional OM656 diesel engine: quiet, torquey, and incredibly frugal
Imperial ride comfort (AIRMATIC air suspension as standard)
Stunning maneuverability thanks to rear-wheel steering (essential option)
World-class cabin soundproofing
Highly efficient Digital Light lighting technology

⚠️ Weaknesses

Frequent electronic bugs on the MBUX system (especially 2020-2021 models)
Temperamental flush door handles (freezing or sensor failure)
Reduced trunk volume on plug-in hybrid versions (PHEV)
All-touch ergonomics (steering wheel controls and climate control) requiring an adaptation period
Steep depreciation in the first few years

🎯 Verdict

The Mercedes S-Class W223 remains the undisputed queen of limousines. If you drive more than 25,000 km per year, the diesel engine (S 350 d or S 400 d) is the absolute choice. The OM656 engine is a masterpiece of reliability and efficiency that alone justifies the purchase of this model. However, the electronic complexity of the W223 requires caution: favor a model from 2022 onwards (the 2020-2021 models experienced the teething problems of the MBUX 2.0 system) and demand a crystal-clear maintenance history within the official network. An extended warranty is highly recommended to cover potential issues related to comfort equipment (flush handles, air suspension, screens).

Common issues

Dysfonctionnements du système d'infodivertissement MBUX Low

🔧 Dès l'acquisition – 50 000 km

💶 0 – 300 € (souvent résolu par mise à jour logicielle, hors garantie diagnostic)

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

Défaillance des capteurs NOx ou du système AdBlue/SCR Medium

🔧 80 000 – 150 000 km

💶 500 – 1 500 €

Assurer un entretien régulier et utiliser un AdBlue de qualité.

Encrassement du filtre à particules (FAP/DPF) Medium

🔧 100 000 – 200 000 km (selon usage)

💶 800 – 2 500 € (régénération forcée ou remplacement)

Privilégier les longs trajets réguliers pour permettre la régénération.

Problèmes électriques mineurs (capteurs, modules) Low

🔧 50 000 – 120 000 km

💶 200 – 800 €

Vérifier l'historique des diagnostics électroniques.

Estimated maintenance costs

Oil change	£160 – 280
Complete brakes	£650 – 1 200
Estimated annual budget	£1 000 – 2 000

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