(¦nü·trəl ′sāf·tē ′swich)
(electricity) An electric switch that is connected to the ignition switch of an internal combustion engine and prevents starting the engine unless the transmission shift lever is in the neutral or park position, or the clutch pedal is depressed.
ANSWER:
It is located on the transmission (underneath the car)
The switch looks like this...click on the link to see a picture of it:
http://www.thepartsbin.com/repsite/mercedes_benz~neutral_safety_switch~reparts.html
The wiring connector has a locking mechanism. Twist the white ring clockwise to unlock and then use a flat blade screwdriver to pop the connector off. It should be easy. Don't raise the engine, just fit a 10mm socket into the 2 bolts, loosen, and remove the switch..if you don't have small hands then you may have to remove the bolts from the flex disk and the engine mounting bolts, raise the engine so the tranny goes down to expose the switch
A brand new neutral safety switch for you E320 will cost about $60
CAUTION
Since you must work under the vehicle to adjust most shift linkages make sure you properly raise and support the vehicle before working under it. Also, wear safety glasses or goggles while working under the vehicle.
A voltmeter can be used to check the switch for voltage when the ignition key is turned to the START position with the shift lever in PARK or NEUTRAL. If there is no voltage, the switch should be adjusted or replaced.
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Thanks for all your help and for providing me with a visual on the part.
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