I was thinking the same thing. The part is also sometimes referred to as crankshaft reference sensor.

http://catalog.worldpac.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=catalog.mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=1SH0P7SVN2520OH8QN&year=2000&make=MB&model=E-320-005&category=F&part=Reference+Sensor&appEngines=_any

__________________
Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".