Abstract: A motor vehicle has an electronically controllable parking lock and an electronically controllable parking brake, which can be controlled individually or in combination. A device having an electronic control unit and a central operating element associated with the parking lock and the parking brake is provided. When the motor vehicle is at a standstill and the central operating element is actuated, the parking lock and the parking brake can be controlled in a specific type of parking-lock and/or parking-brake activation. In a first specific type, during a first actuation of the central operating element, at least the parking brake is automatically activated first. If the central operating element is then re-actuated within a predefined time window, or if the central operating element remains actuated for a predefined minimum time period, the driver is offered at least one possibility of manually selecting a specific type of parking-lock and/or parking-brake activation.

Abstract: A method is disclosed for operating a parking brake by a driver of a vehicle, wherein the parking brake is operated by a switching key, which is designed for taking up at least two and, in particular, three states. The method detects the state of the switching key; codes the detected state; generates a check word for the coded state by use of a cyclic redundancy check; creates a message suitable for the transmission by way of a single-wire channel, the message including the coded state and the check word; and sends the message by way of the single-wire channel.

Abstract: A method is disclosed for operating a parking brake by a driver of a vehicle, wherein the parking brake is operated by a switching key, which is designed for taking up at least two and, in particular, three states. The method detects the state of the switching key; codes the detected state; generates a check word for the coded state by use of a cyclic redundancy check; creates a message suitable for the transmission by way of a single-wire channel, the message including the coded state and the check word; and sends the message by way of the single-wire channel.