For decades, the Mercedes-Benz S-Class has defined the pinnacle of luxury saloon cars. Now, it has decisively entered the era of electrification. The latest generation, launched in 2020, is available in two sophisticated plug-in hybrid (PHEV) variants: the S 450e and the S 580e 4Matic. Combining a sleek 3.0-litre petrol engine with a 150hp electric motor and a sizeable 22kWh battery, these models offer a compelling blend of zero-emissions capability and traditional S-Class grandeur.
Driving Experience and Performance
The heart of the S-Class PHEV is an elite drivetrain designed for seamless power and refinement. The turbocharged 3.0-litre six-cylinder petrol engine delivers either 299hp or 367hp, augmented by the electric motor. The result is impressive: the S 450e can achieve 0-62mph in 5.9 seconds, while the all-wheel-drive S 580e 4Matic manages it in just 4.9 seconds. Crucially, both offer a substantial pure-electric range – up to 67 miles for the S 450e and 63 miles for the S 580e – effectively eliminating range anxiety for daily urban commutes.
In practice, the driving experience is sublime. Refinement in electric mode is exceptional, and the transition to the petrol engine is barely perceptible. The standard air suspension glides over imperfections, maintaining a serene cabin environment. A clever haptic accelerator pedal features a 'pressure point' to help drivers stay in EV mode, maximising electric use. For recharging, a powerful 60kW DC rapid charger can boost the battery from 10-80% in just 20 minutes, while a home 7.4kW wallbox will complete a full charge in around three and a half hours.
A Lavish, Tech-Filled Interior
Step inside, and the S-Class reaffirms its status as a luxury masterclass. The cabin is swathed in ultra-soft nappa leather, with impeccable build quality and extensive customisation options. The model is now offered exclusively in a long-wheelbase configuration, providing palatial legroom in the rear, where heated and ventilated electrically-adjustable seats are standard.
The digital-first cockpit is centred around a sharp 12.8-inch OLED infotainment screen running the intuitive MBUX system. A 12.3-inch 3D driver display complements it. The wealth of technology includes a fingerprint scanner for personal profiles, geofencing alerts, and an augmented reality head-up display on higher specs. The optional £3,000 rear-seat entertainment package adds dual 11.6-inch screens with streaming services. However, the touch-sensitive steering wheel controls can prove frustratingly fiddly to use.
Practicalities and Running Costs
Ownership of an S-Class PHEV involves significant financial commitment. The S 450e starts from £111,685, with the S 580e 4Matic commanding over £119,000. Options can easily add a five-figure sum. Practicality is slightly compromised by the high-voltage battery, which reduces boot space compared to the regular S-Class – a potential headache for airport runs.
Where the plug-in hybrid shines is in reducing running costs. For businesses ferrying executives around town, the generous electric range allows for near-silent, zero-tailpipe emission travel. On longer journeys, the hybrid system enhances fuel efficiency. Drivers must still budget for group 50 insurance and maintenance costs befitting a flagship limousine.
Verdict: The Benchmark Adapts
The Mercedes-Benz S-Class plug-in hybrid is a formidable machine that successfully transplants the model's legendary comfort and status into a more sustainable package. Its large battery delivers a genuinely useful electric range, while the creamy six-cylinder engine ensures no compromise on long-distance refinement. Despite its age relative to newer rivals, a high price tag, and a smaller boot, it remains a highly-rated choice. For CEOs and celebrities seeking the ultimate in wafting refinement with a green conscience, the S-Class PHEV continues to set a formidable standard.
