>
> Bill Ditmire writes:
>
>> The plugs should be activated for about a minute or until
>> the engine starts.
>
>
> A *minute?* Isn't that an exaggeration? I've owned two
> 300Ds, and the glow plugs on either car have never come
> on for longer than 8-10 seconds.
>
> By the way, something I've always wondered: do the glow
> plugs come on for a fixed interval, or is there a tem-
> perature sensor that adjusts the preglow interval to
> compensate for ambient temperature? (Living in Calif-
> ornia, I don't get enough seasonal temperature variation
> to make this readily apparent.)
>
>
>
> Geoff
>
Tere is a temperature sensor, it is not fixed time glow. Jacek.