Mercedes S500 PHEV: 442 Hp Luxury Hybrid Review

The Mercedes S500 plug-in hybrid represents a pinnacle of automotive engineering, fusing the brand’s renowned opulence with cutting-edge hybrid technology. This model delivers V8-like performance alongside compact-car fuel economy, all while maintaining the serene comfort expected from the S-Class lineage. Designed for executives who demand refinement without environmental guilt, it pairs a potent petrol engine with electric propulsion for versatile daily driving.

Powertrain Innovation: Seamless Hybrid Synergy

At the heart of the S500 PHEV lies a 3.0-liter biturbo V6 engine producing 333 horsepower and 480 Nm of torque, augmented by an 85 kW electric motor contributing an additional 340 Nm. This combination yields a total system output of approximately 442 horsepower and 650 Nm, propelling the long-wheelbase sedan with authority comparable to its V8 siblings.

The seven-speed automatic transmission integrates the electric motor between the engine and gearbox, enabling fluid transitions between power sources. In electric-only mode, drivers enjoy up to 33 km of emission-free range, extendable beyond 40 km with judicious throttle control, as noted by Mercedes test drivers. Hybrid mode orchestrates the duo for optimal efficiency and thrust, while E-Save and Charge modes preserve or replenish battery capacity during journeys.

• E-Mode: Pure electric propulsion for silent, zero-emission urban cruising.
• Hybrid Mode: Intelligent blending for balanced performance and economy.
• E-Save/Charge: Maintains battery or uses engine to recharge for later EV use.

Real-world tests confirm its prowess: on a 76 km extra-urban loop at 66 km/h average speed, it achieved 5.3 l/100 km with a half-charged battery, outperforming the diesel S350 BlueTec’s 6.5 l/100 km under similar conditions. Official NEDC figures quote 2.8 l/100 km and 65 g/km CO2, though spirited driving elevates this to around 8.0 l/100 km over mixed routes.

Driving Dynamics: Composed and Commanding

Despite a 200 kg weight penalty from the battery and systems, the S500 PHEV handles with poise. Electro-mechanical steering adjusts progressively with speed, offering direct feedback at low velocities and stability at highway paces. The absence of 4MATIC in early models underscores a rear-drive focus, yet traction remains assured via torque vectoring and electronic aids.

Acceleration feels V8-esque, especially in Sport mode, where the electric boost fills low-end gaps of the V6. Zero-to-60 mph arrives in under 5 seconds, with seamless engine kick-in during EV demands. Ride quality, courtesy of air suspension, absorbs imperfections while cornering exhibits minimal body roll, aided by wide Pirelli tires in later variants.

Interior Refinement: A Sanctuary of Sophistication

Step inside, and the S500 PHEV envelops occupants in sumptuous leather, wood veneers, and ambient lighting. The long-wheelbase cabin offers limousine-like rear space, with reclining seats, massagers, and individual climate zones. Dual 12.3-inch screens dominate the dashboard, controlled via voice, touchpad, or gesture.

Noise insulation is exemplary; EV mode renders the cabin eerily quiet, rivaling the best in class. Burmester audio and adaptive cruise enhance long-haul comfort. Practicality includes a 75-liter boot, though charging cable storage poses a minor quirk for traditional S-Class buyers.

Charging and Practicality: Plug-In Realities

Recharging takes 2 hours on AC fast-charger or under 4 hours via household socket, making home overnight top-ups feasible. Battery capacity supports conservative 33 km EV range, ideal for commutes but limiting for extended EV-only trips. Weight distribution remains balanced, preserving the S-Class’ planted feel.

Compared to rivals, it undercuts V8 models in running costs while matching luxury. Priced akin to the standard S500 at launch (~€110,000), the PHEV justifies premiums via superior efficiency and tech.

Pros and Cons: Balanced Verdict

• Pros: Explosive performance, ultra-low official emissions, peerless comfort, innovative drive modes.
• Cons: Real-world economy varies, limited EV range, charging infrastructure dependency, added weight.

Who Should Buy It?

Ideal for company car drivers chasing Benefit-in-Kind tax savings, urban executives with home charging, or luxury seekers embracing electrification. Less suited for pure long-distance haulers without plugs.

FAQ

How far can the S500 PHEV drive on electric power alone?

Up to 33 km officially, with over 40 km possible via efficient driving.

Does it match the V8 S500’s performance?

Yes, total output nears 442 hp, delivering similar acceleration and overtaking ease.

What’s the real-world fuel consumption?

Around 5.3-8.0 l/100 km depending on mode and conditions, beating diesels in tests.

Is 4MATIC available?

Not in early PHEV models; rear-drive standard.

How long to charge?

2 hours fast AC or 4 hours standard household.

Technical Specifications

In summary, the Mercedes S500 PHEV redefines luxury hybrids, proving electrification enhances rather than dilutes the S-Class experience. Its blend of power, poise, and parsimony sets a benchmark for plug-in flagships.