It tell you what the outside temperature is, and if you have a ambiant temperature guage with a sender on the bummper then this will tell you the temperature of the road surface so that you know if its forming black ice or icy road conditions.
You can buy it online here: http://www.drivewire.com/vehicle/mercedes-300e/mass-air-flow-sensor/
I saw on another forum that the oil pressure sensor is under the oil filter.
There are two fuel pumps in a Mercedes 300E
Can u use regular unleaded gasoline in 1987 Mercedes Benz 300e
Answering "Serpentine belt diagram for 1992 Mercedes Benz 300e 2.6?"
2004 mercedes benz tuneover but want start
The fuel pump relay on a 1988 Mercedes-Benz 300E is located on the passenger side, near the firewall, by the battery. Mercedes-Benz was founded in 1926.
DexIII/Merc
7.3 Litres
0.80 mm.
The blower motor on a Mercedes Benz 300e is changed by disconnecting the wiring harness and unbolting the blower from its housing. The motor is then lifted away and a new blower motor connected.
where is the chassis no. on my 1992 300sd