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Old 09-02-2019, 03:36 AM
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spock505 spock505 is offline
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Join Date: Nov 2007
Location: Blighty
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From memory, one of the two pipes mentioned is a by-pass for when the heater matrix is off via duo valve.
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1996 Mercedes S124 E300TD - 129k - rolling restoration project -

1998 Mercedes W210 300TD - 118k (assimilated into above vehicle)
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