I have no glow plug light showing when I turn ignition on

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mercmancdi

MB Enthusiast
Joined
Feb 18, 2012
Messages
1,198
Location
Templepatrick
Car
mercedes E320 cdi sport ,vw Tiguan R line , M B cls , bmw convertible
06 face lift clk 320cdi v6 7 speed.
I have no glow plug light showing on dash when I turn ignition on yet
the icarsoft shows no fault.
Any way this only operates when exterior temperature drops to a certain level.

I should know this but just can’t think straight.
 
Glow plugs also perform a post ignition function to reduce emissions, so should operate
 

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