The GTS exterior design was kept similar to that of the preceding SLS AMG. It features the wide wheel arches, lower bodywork, and fastback sloping roofline of the SLS AMG, but uses forward-opening doors instead of the iconic gullwing style pioneered by the 300 SL in the 1950s. The large hood and slim windscreen have been retained. The vehicle structure is made up of 93% aluminium, with the front module base made up of magnesium.