The seats in the new Mercedes-Benz M-Class are designed to provide a high level of comfort on long journeys as well as excellent lateral support. All important parameters can be electrically adjusted, including height, backrest angle, seat cushion angle and reach. Generous seat adjustment travel of more than 350 millimetres lengthways and more than 90 millimetres in height ensure that drivers of all sizes will always find the ideal seating position.

A high level of variability characterises the rear seats, which are fitted with an armrest and cup holder. The angle of their backrests can be adjusted, and they can be also folded in the ratio 1/3:2/3, thus creating a through-loading feature for long objects, such as skis, without having to sacrifice all of the rear seat positions. Folding both backrests as well as the seat cushions forward creates a level load compartment with a capacity of 2010 litres up to the roof liner.

Exclusively available for the new M-Class are three seat and two sports seat variants in six different colour combinations. The sports seats reserved for the Sports package feature a different stitching pattern which is also incorporated into the door centre panels.

Four colours are available for the interior appointments: black, almond beige, alpaca grey and marron/tobacco brown. These can be combined with a wide range of materials: fabric/ARTICO man-made leather in black, ARTICO man-made leather and leather in six colour combinations, in conjunction with the Interior Sports package with DINAMICA microfibre and leather in black.