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Old 07-19-2000, 08:09 PM
Registered User
Join Date: May 1999
Location: Toronto,On,Canada
Posts: 280
Stupid question.What does it do?Why is there a knob on top?Part # 011 545 7932
Many thanks

Tom 1992 300E 2.6
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Old 07-19-2000, 08:41 PM
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
The MAS is the combination of number of previous semi smart relays. These relays carried the loads for most of the high current users involved with the engine. These relays include, fuel pump, A/C clutch, AIR pump (smog pump)clutch and at least one other user I can't recall.

Because of the large number of contacts and previous problems with these circuits MB designed a relay that would "screw" itself into the connector. That is the purpose of the knob. One direction it unsockets the relay the other way it inserts itself.
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Old 07-19-2000, 09:38 PM
Registered User
Join Date: May 1999
Location: Toronto,On,Canada
Posts: 280
Thanks Steve,
I have turned the knob clockwise maximally and the dial points to I,Please confirm that this is the inserted position.
A thousand thanks.

Tom 1992 300E 2.6
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