4 - Glass Base, Clear Glass, 12 Volt, 1.2 Watt, Instruments, Switches and A/C Control Illumination Bulbs.
This bulb is 5mm in diameter and 20mm tall with a glass base, and clear glass.
This was also used in switches, dash gauges, heater control illumination, ashtray, and other uses.
There are 2 other alternative bulbs with 1.2 wattage, see the illustration, however this is the recommended one from Mercedes-Benz, for these applications.
This bulb can be used in all applications the other 2 - 1.2W bulbs were used in.