Mintyfresh77
Member
Chassis: S211
Engine: OM646 Evo
Year: 2009
Mileage: 119m
So on some of the cold mornings recently the car was reluctant to start in the usual fuss free way but after some perseverance spluttered into life. I figured something glow plug related so hooked up icarsoft MB v2 to see if anything obvious was being reported and it noted cylinder 3 output stage (no signal) which I interpreted to be a duff glow plug (Yes I know Star would tell the whole story but I don't have that).
As I have only recently acquired the vehicle and don't know how old the current glow plugs were I went ahead and got a new set of the correct NGK plugs from the local stealer in the hope I could fluke a quick fix and GP service in one go but before I fitted the new plugs I visually tested the old plugs out of the cylinder by connecting neg lead to thread of the plug and engine block and used the normal plug lead for power now here comes the bizarre bit.
When I turned ignition on and watched the dashboard glow plug light go out after a few seconds I watched the glow plug in the engine bay and no sign of life so I turned ignition off and almost immediately the plug glowed into life briefly and then slowly faded off. Baffled I tested another cylinder and exactly the same, I then tested new plugs and exactly the same result so the plugs are effectively glowing into life at totally the wrong key/ignition stage. Is this a characteristic of relay/module failure?
I hope not because when I asked the dealer about a new glow plug module they said it's not made/supplied anymore!!!
Any words of wisdom welcomed!
Engine: OM646 Evo
Year: 2009
Mileage: 119m
So on some of the cold mornings recently the car was reluctant to start in the usual fuss free way but after some perseverance spluttered into life. I figured something glow plug related so hooked up icarsoft MB v2 to see if anything obvious was being reported and it noted cylinder 3 output stage (no signal) which I interpreted to be a duff glow plug (Yes I know Star would tell the whole story but I don't have that).
As I have only recently acquired the vehicle and don't know how old the current glow plugs were I went ahead and got a new set of the correct NGK plugs from the local stealer in the hope I could fluke a quick fix and GP service in one go but before I fitted the new plugs I visually tested the old plugs out of the cylinder by connecting neg lead to thread of the plug and engine block and used the normal plug lead for power now here comes the bizarre bit.
When I turned ignition on and watched the dashboard glow plug light go out after a few seconds I watched the glow plug in the engine bay and no sign of life so I turned ignition off and almost immediately the plug glowed into life briefly and then slowly faded off. Baffled I tested another cylinder and exactly the same, I then tested new plugs and exactly the same result so the plugs are effectively glowing into life at totally the wrong key/ignition stage. Is this a characteristic of relay/module failure?
I hope not because when I asked the dealer about a new glow plug module they said it's not made/supplied anymore!!!
Any words of wisdom welcomed!
