Control instruments - basic information Control instruments, such as the speedometer or fuel gauge, are concentrated on the dashboard. If any device fails, it is necessary to replace the entire unit, since it cannot be disassembled.
The instrument panel unit is controlled by a microprocessor and has a self-diagnostic system. If malfunctions appear in the elements of the system, the corresponding codes are recorded in the fault memory of the control device. These codes can be displayed using a special BMW tool. In addition, the following functions, for example, can be adapted or corrected using the device: fuel tank indicator, fuel consumption indicator, service interval indicator, distance meter.
This section also describes the removal and installation of various switches and the radio.