Underlying the Grand Sports Tourer's spacious interior is a new design concept. Unlike conventional saloons with a three-box layout (engine compartment/interior/boot), the R-Class is based on a two-box design concept (engine compartment/interior). As a result, the interior occupies 64% of the total length of 4.922 metres, giving the R-Class far more space than many conventional saloons. Plus all six occupants can enjoy a window seat. And the fact that you sit higher than in a conventional saloon also gives you excellent all-round vision.

Anyone still not satisfied can always opt for the long-bodied version, which measures 5.157 metres from nose to tail. This version provides even more comfort for passengers in the third row of seats.

With the optionally available panoramic glass roof, which occupies almost the entire roof area and is thus considerably larger than a conventional sliding roof, the airy and spacious feel can be taken even further. The panoramic glass roof makes the interior lighter and brighter and creates a superb open-air feel.