An apparatus can include a door control mechanism that defines a cavity. The door control mechanism can include an actuator body comprising a contact surface. The door control mechanism can include a projection that extends from the actuator body into the cavity. The apparatus can include a spacer to be disposed in the cavity. The spacer can include a spacer body, a first stopper, and a second stopper. The first stopper can extend from the spacer body. The first stopper can interface with the contact surface of the actuator body. The second stopper can extend from a surface of the spacer body. The second stopper can interface with the projection of the door control mechanism. At least one of the first stopper and the second stopper can prevent the door control mechanism from actuating in response to a manual force.

An adjustment device for a vehicle part of a vehicle that can be adjusted comprises a central control unit and a local control unit connected via a communication interface to the central control unit, and directly activates the electrical drive for stopping or reversing an adjustment process upon a specified pinching criterion. The central control unit transmits a triggering threshold value for the operating variable to a respective local control unit with an adjustment request for the vehicle part, and a reaction to be triggered upon reaching the triggering threshold value. The central control unit, as necessary, transmits new values to the respective local control unit during the adjustment process. The local control unit compares the determined values of the operating variable to the current triggering threshold value(s) and independently triggers the reaction transmitted when an operating variable exceeds or falls below the assigned current triggering threshold value.

A crane cabin door system for a mobile crane includes a door which is designed to close an access opening of the crane cabin and guided between an open position and a closed position by a guide mechanism; a door drive which is designed to move the door between the open position and the closed position; and a control unit which is connected to the door drive and to at least one control element and which actuates the door drive in accordance with a user input made via the at least one control element.