Mechanics

ML270 GLOW PLUG STAY ON EVEN I CHANGED THE PLUGS AND THE RELAY

2001 Mercedes Benz 270ml • 176,000 miles

My ml270 glow plug light stay on, eventhough I changed all the plugs and the relay
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Transauto@yahoo.com
January 5, 2011.



You have to have a prob with the harness. Start at the relay with a schematic you will find you have power going to a circuit when no power is supposed to be there. This prob could be a faulty ignition switch sending power to the wrong circuits this is an electronic switch located on top side of your steering coloumn.

Billymac
Feb 3, 2011.