Suspect you are referring to a fan blower motor regulator?
If so....Pay special atention to chassis cut off dates. If it falls between these numbers http://catalog.worldpac.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=catalog.mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=25L0RF04Y25U00Z5MG&year=1999&make=MB&model=E-320-005&category=R&part=Blower+Regulator it is replaceable. If not you will need a new blower motor, regulator, and plastic cover assembly.
If the latter is the case you can also purchase a W140 regulator and cut and splice the wiring to work on the W210 blower.
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Terry Allison
N. Calif. & Boca Chica, Panama
09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)
Last edited by TMAllison; 08-21-2007 at 12:53 PM.
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