Mercedes E 300 de 2019 Review
Discover the efficient diesel-electric hybrid that blends luxury, power, and eco-friendliness in the executive class.

Mercedes E 300 de 2019: Revolutionizing Executive Hybrids
The Mercedes-Benz E 300 de from 2019 marks a significant step forward in plug-in hybrid technology, pairing a reliable diesel engine with electric propulsion to deliver outstanding efficiency and refined driving dynamics. This model appeals to company car drivers and eco-conscious professionals who demand luxury without sacrificing performance or range.
Powertrain Innovation and Performance
At the heart of the E 300 de lies a sophisticated powertrain that integrates a 2.0-litre four-cylinder diesel engine producing 191bhp and 400Nm of torque with a 121bhp electric motor adding 440Nm. Together, they generate a combined output of 302bhp and 700Nm, enabling brisk acceleration from 0-60mph in 5.7 seconds for the saloon and 5.8 seconds for the estate, with a top speed limited to 155mph.
The 13.5kWh battery supports up to 34 miles of electric-only driving in the saloon (32 miles in the estate), charged fully in under two hours via a 7.4kW wallbox. This setup excels for short commutes, allowing zero-emission travel while the diesel provides stamina for longer journeys.
- Combined power: 302bhp and 700Nm torque
- 0-60mph: 5.7 seconds (saloon)
- Electric range: 34 miles
- Charging time: <2 hours (7.4kW)
Driving Experience: Comfort Meets Capability
Behind the wheel, the E 300 de mirrors the standard E-Class’s poise, prioritizing serene cruising over sporty handling. Its suspension delivers a plush ride, soaking up road imperfections effortlessly, especially in SE trim with smaller wheels. The electric motor’s instant torque ensures smooth overtakes, and the nine-speed automatic shifts seamlessly between power sources.
On motorways, the diesel shines, maintaining efficiency beyond 50mpg even without battery assistance, outperforming petrol hybrids on extended runs. Hybrid mode optimizes fuel use intelligently, though pure electric suits urban and suburban use best. The added battery weight slightly firms the ride but preserves the E-Class’s renowned composure.
| Aspect | Saloon | Estate |
|---|---|---|
| 0-60mph | 5.7s | 5.8s |
| Electric Range | 34 miles | 32 miles |
| Top Speed | 155mph | 155mph |
Luxurious Interior and Practicality
The cabin upholds Mercedes’ benchmark for luxury, featuring dual widescreen displays for infotainment and gauges, premium materials, and supportive seats. Hybrid-specific controls are minimal, blending seamlessly with the E-Class’s high-tech ambiance. Rear space accommodates adults comfortably for long trips.
Boot capacity dips to 400 litres in the saloon (from 540 litres standard) and 500 litres in the estate due to the battery, with a raised floor limiting tall items. Still, it handles daily needs like suitcases adeptly. Base SE includes 18-inch alloys, electric seats, parking aids, and the widescreen cockpit; AMG Line adds sportier styling.
- Premium leatherette upholstery and ambient lighting
- Dual-zone climate control and keyless entry
- Optional Premium Plus pack: sunroof, Burmester audio
Efficiency and Ownership Costs
Official figures boast 166mpg and 41g/km CO2 under WLTP, yielding a 13% Benefit-in-Kind tax rate, matching petrol hybrids but with diesel’s touring efficiency. Real-world results hit 55mpg on out-of-town drives, dropping from urban peaks when charged regularly. This makes it ideal for low-mileage users with charging access.
Priced near £50,000, it undercuts some rivals while offering superior long-range economy. Maintenance aligns with E-Class standards, bolstered by Mercedes’ warranty and reliability reputation.
Trims and Customization Options
Choose from SE for value or AMG Line for flair. Key options include:
- Night Package (£595): Black styling accents
- Premium Plus (£5,395): Advanced driver aids, premium sound
- Driving Assistance Package: Semi-autonomous features
Personalization extends to wheels, paints, and tech packs, ensuring a tailored executive experience.
Safety and Technology Highlights
Mercedes’ suite of aids includes active brake assist, lane-keeping, and adaptive cruise. The MBUX system responds to voice commands like “Hey Mercedes,” controlling navigation and climate. Parking assist with cameras simplifies maneuvers in tight spaces.
Competitor Comparison
Versus BMW 530e or Audi A6 50 TDI quattro, the E 300 de stands out with diesel-hybrid efficiency and electric parity. Its comfort edges rivals, though boot space lags slightly.
| Model | Power (bhp) | Electric Range | 0-60mph |
|---|---|---|---|
| E 300 de | 302 | 34 miles | 5.7s |
| BMW 530e | 288 | 30 miles | 5.9s |
| Audi A6 50 TDI | 286 | N/A | 5.5s |
Pros and Cons
- Pros: Exceptional efficiency, luxurious interior, smooth power delivery, low BIK tax
- Cons: Reduced boot space, best with regular charging, firm ride on AMG wheels
Frequently Asked Questions (FAQs)
What’s the real-world fuel economy of the E 300 de?
Around 55mpg on mixed driving, up to 166mpg if maximizing electric mode.
Can I get the E 300 de as an estate?
Yes, with 32-mile electric range and 500-litre boot.
How long does charging take?
Under 2 hours with a 7.4kW charger.
Is it suitable for long motorway trips?
Absolutely, diesel efficiency shines here, over 50mpg possible.
What’s the BIK tax rate?
13%, thanks to 41g/km CO2.
Final Thoughts on the E 300 de Legacy
The 2019 E 300 de pioneered diesel plug-in hybrids, offering a compelling blend of luxury, efficiency, and versatility. Ideal for executives balancing commutes and road trips, it retains E-Class refinement with greener credentials. Though newer models evolve, this version set a high standard.
References
- Mercedes-Benz E 300 de 2019 review — Car Keys. 2019-approx. https://www.carkeys.co.uk/car-reviews/mercedes-benz-e-300-de-2019-review
- New Mercedes E 300 de 2019 review — Auto Express. 2019-approx. https://www.autoexpress.co.uk/mercedes/e-class/106616/new-mercedes-e-300-de-2019-review
- 2019 Mercedes-Benz E-class Review, Pricing, and Specs — Car and Driver. 2019-01-01. https://www.caranddriver.com/mercedes-benz/e-class-2019
- 2019 Mercedes-Benz E-Class Review & Ratings — Edmunds. 2019-approx. https://www.edmunds.com/mercedes-benz/e-class/2019/review/
- Mercedes E300 de: diesel-electric hybrid tested — Top Gear. 2026-approx. https://www.topgear.com/car-reviews/mercedes-benz/e63-amg/e300de-se-4dr-9g-tronic/first-drive
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