a control device in a vehicle , which control device is connected to , and is for operating , a semi - automatic gearbox , can be set in various gearchange function positions and can , in at least one gearchange function position for traveling forwards , be operated for gear changing . the control device is also connected to , and is for operating , a supplementary brake . this control device replaces both the gear lever and the supplementary brake lever , resulting in increased driving safety and better ergonomics for the driver .