The E 300 de is powered by a 194 PS (191 HP) 2.0-liter diesel engine and a 122 PS (121 HP) electric motor that put out a combined 306 PS (302 HP) and 700 Nm (516 lb-ft) of torque.
Mercedes claims an average consumption of 166.2 mpg UK (1.7 l/100km, 138.36 mpg US) on the combined cycle, with just 41 g/km of CO2 emitted by the saloon and 44 g/km by the estate. In a straight line, you can rush from zero to 100 km/h (62 mph) in 5.9 seconds with the saloon and 6 seconds flat for the estate.
The fully electric range is 34 miles (54 km) for the four-door and 32 miles (51 km) for the wagon, while the battery can be charged from 10 to 100% in under two hours with a 7.4 kW charger.
Entry-level SE models feature blind spot assist, widescreen cockpit, four USB ports, illuminated door sills, split-folding rear seats, Parking package with Active Parking Assist, Seat Comfort package with electro-pneumatic four-way lumbar support, ambient lighting, 18-inch alloy wheels, Keyless-Go, light carbon-grain aluminum trim (with a black open-pored ash wood center console) and heated front seats. The AMG Line trim adds AMG exterior styling, 18-inch five-twin-spoke alloys, black open-pore ash wood trim with Artico Dinamica leather upholstery, an AMG steering wheel and privacy glass.
For an extra £2,395 ($3,132) you can get the Premium package, which adds COMAND Online, the Memory package, wireless charging, Multibeam LED and the Parking package with a 360-degree camera. The £4,395 ($5,749) Premium Plus package gives you all that plus a Burmester surround sound system, Keyless-Go package with hands-free access, automatic powered boot closing, keyless entry and a panoramic sunroof.
Customers can opt for the Comfort pack, which costs £1,895 ($2,478) for the SE trim and £3,295 ($4,309) for AMG Line models. It includes Air Balance, Energizing comfort control, Air Body Control air suspension and Nappa leather upholstery (AMG Line only). For an extra £595 ($778), the Night package adds high-gloss black 18-inch wheels, diamond radiator grille and a single louvre in high-gloss black. The same color is then used for the front apron and rear bumper.
As for active safety, the £595 ($778) Lane Tracking package includes Active Lane Keeping Assist, while the more comprehensive £1,695 ($2,216) Driving Assistance package adds Active Brake Assist, Active Distance Assist, Active Speed Limit Assist, Active Lane-change Assist, Evasive Steering Assist, Pre-Safe Impulse Side and Pre-Safe Plus.