ml270 glow plug stay on even i changed the plugs and the relay

2001 MERCEDES BENZ 270ML
176,000 MILES
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my ml270 glow plug light stay on, eventhough i changed all the plugs and the relay
Jan 5, 2011 at 5:15 AM
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BILLYMAC
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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.
Feb 3, 2011 at 2:05 PM