How do you replace speedo bulb on 1981 Mercedes 380sl?

To replace the speedometer bulb on a 1981 Mercedes 380SL, first, disconnect the car battery for safety. Remove the instrument cluster by unscrewing the screws that hold it in place, then carefully pull it out. Locate the speedometer bulb holder at the back of the cluster, twist it counterclockwise to remove it, and replace the old bulb with a new one. Finally, reassemble the cluster and reconnect the battery.