Motor car with a fastening arrangement for fastening a subframe for a vehicle axle to a body of the motor car

A motor car, comprising:

• a body with a body structure element;
• a rear axle subframe (10) for a vehicle rear axle (12), wherein the rear axle subframe (10) comprises a first side member (18), a second side member (18), a front cross member (20), and a rear cross member (22) and wherein the rear axle subframe (10) adjoins the body structure element via a region (52);
• a fastening arrangement for fastening the rear axle subframe (10) to the body;
• and
• an underfloor energy storage unit (38) for an electric drive of the motor car, wherein the rear axle subframe (10) adjoins the underfloor energy storage unit (38);
• wherein the rear axle subframe (10) has a support device (32) with at least one support element (30);
• wherein the at least one support element (30) is disposed on an upper side of one of the first and second side members (18) of the rear axle subframe (10), at a distance from the body structure element, and rearward of the body structure element in a longitudinal direction of the motor car;
• wherein in an assembled state a first distance (A) between the rear axle subframe (10) and the underfloor energy storage unit (38) is greater than a second distance which is above the underfloor energy storage unit (38) in a vertical direction of the motor car between the at least one support element (30) on the upper side of one of the first and second side members of the rear axle subframe (10) and the body structure element of the body;
• wherein, in an event of an accident-induced forward movement of the rear axle subframe (10) in the longitudinal direction of the motor car towards a center of the motor car as a result of a rear impact on the body of the motor car, the at least one support element (30) is displaced forward in the longitudinal direction of the motor car and provides support on the body structure element above the underfloor energy storage unit (38) in the vertical direction of the motor car such that the at least one support element (30) transfers a crash force of the rear impact into the body above the underfloor energy storage unit (38) in the vertical direction of the motor car via the body structure element before the rear axle subframe (10) hits the underfloor energy storage unit (38).