Question about 1983 Mercedes-Benz 300-Class
No the glow plugs circuit is separate. They actually are on a timed delay shut off. Check the glow plug relay module behind the driver side headlamp assembly. If the light on the cluster is staying on all the time it's simply letting you know there is a fault in the glow plug circuit. Doesn't actually mean that the glow plugs are staying on all the time. You might just have a bad glow plug which is breaking the circuit therefor the glow plug light stays on. To check this use a test light and have someone turn on and off the ignition to see which plug doesn't light up.
Posted on Oct 11, 2010
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Posted on Jan 02, 2017
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