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MAS Control Unit-what all does it do?

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#1

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02-24-2004, 07:23 PM

brewtoo

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MAS Control Unit-what all does it do?

1991 300E.

I know MAS unit controls the fuel pump relay and A/C compressor and maybe has something to do with transmission kickdown.

Anything else?

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#2

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02-24-2004, 08:08 PM

Gilly

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I'm pretty sure it also provides power for the O2 sensor heater.

Gilly

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