Quote:
Originally Posted by macdoe
I feel silly thinking that somehow the glow plugs know the temperature of the engine block if it is cold out....I guess it would need some sort of temperature sensor feedback system. Glad to know of this timer. Thanks.
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The later W123 models use ambient air temp to control how long the light remains illuminated and how long the glow cycle lasts.
Quote:
Originally Posted by macdoe
I was under the impression that the glow light on the dash would not come on if there was a glow plug problem?
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On the five cylinder engines, it is
possible to have one bad glow plug (as long as it's not cylinder #1) go undetected by the fault detection sytem.