'87 M103 engine 300E. There is one sensor up front with a three pronged plug and there is one up back of the engine compartment under the oil filter. Just look for the head of the hex screw. Bit misleading because they are both referred to as crankshaft sensors or at least they were to me. Sorry I cannot give you more details but will clean this answer up a bit tomorrow with part nrs. etc.
-j
I was told it is on the top to the bell housing
You can buy it online here: http://www.drivewire.com/vehicle/mercedes-300e/mass-air-flow-sensor/
it will be located somewhere on the exausht pipe after the manifold approx
I saw on another forum that the oil pressure sensor is under the oil filter.
hi! cold start valve.
The blower motor resistor on a Mercedes 300e is located beneath the blower motor on the Mercedes 300e, if ever it needs replacing.
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ok
The voltage regulator for a 300e Mercedes is mounted on the rear of the alternator. The regulator is a replaceable item, independent from the alternator.