Thread: '91 300D 2.5 minor heating issue...where to start?
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  #12  
Old 11-13-2010, 01:37 AM
jt20 jt20 is offline
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Join Date: Mar 2008
Posts: 4,642
I believe Mr.Bob is right.... it goes on when the glowplug light comes on.

even before you start the car, even if the CCU is off
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