Mercedes is putting the finishing touches on its brand new E Class Estate (S213).

Judging by the light amount of camouflage, we are likely only a few weeks away from the midsize wagon’s official reveal. It’s not like the disguise on the rear end of this red prototype is really hiding something that we haven’t seen before, with the C Class Estate painting a very accurate picture of what to expect from its bigger brother. Even in prototype guise, it’s easy to notice the resemblances between the two posh family haulers, with Mercedes’ designers making only a few subtle changes to differentiate its two wagons.

Needless to say, those shopping in this segment care a great deal about cargo capacity. With the outgoing E Class Estate providing a massive 24.5 cubic feet (695 liters) with the rear seats up and 68.8 feet (1,950 liters) once you fold them down, it’s about as practical as a midsize wagon gets. However, the new one adopts a sleeker design and this will hamper the trunk’s size which will have a “little less” space, according to Mercedes design chief, Gorden Wagener, in his interview with Auto Express. That being said, the car looks huge in the attached images showing the side profile, so the trunk will still have a more than generous size.

The wheelbase will be borrowed from the sedan (W213) and will measure 115.7 inches (2.93 meters), an increase of 2.6 inches (66 mm) compared to the outgoing E Class Estate. This will bring more legroom for passengers sitting in the back, thus making the premium wagon even more relaxing on longer journeys with the whole family.

As far as the engines are concerned, these will obviously be carried over from the sedan. The bread and butter of the range will be the brand new turbodiesel 2.0-liter four-cylinder in the E220d. It has 192 horsepower (143 kilowatts) and generates 295 pound-feet (400 newton meters), making it more powerful than the old turbodiesel 2.1-liter and at the same time smaller and lighter. Prospect buyers should know this engine works exclusively with a nine-speed automatic transmission.

If you would rather have something with a lot more punch, an E63 Estate is expected to see the light of production day at the beginning of 2017. That one will get Mercedes-AMG’s upgraded biturbo 4.0-liter V8 with as much as 580 horsepower (426 kilowatts) in the E63 S which will be the cream of the crop in the E Class Estate family.

Gallery: 2017 Mercedes E Class Estate spy photo