Can anyone help please......... I maintain my own vehicles and have done since I was 17, 35 years ago. I have a problem with my 220 CDI Estate, on cold start the glow plug lamp lights, the engine starts and runs fine, but a few seconds later the lamp comes on again for perhaps 10 seconds. I havent owned the car long and it has only just started doing it. The weather has turned cold 5 to -2 degrees. Is this normal or does this indicate the glow plugs need changing. The car is nearly 4 years old and covered 55000 miles.

Thanks in anticipation. Delboy

Take an ohm meter to the plugs. Good ones will measure about 0.6 ohms cold. Lots of info on this in the archives.

Len

I'm not familiar with the newer models but it sounds to me that if it starts fine with no missing that the plugs might be ok. Maybe the relay is messed up, sending another light signal when it shouldn't? Hopefully someone with more experience on that model can help.

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Seth

1984 300D 225K
1985 300D Donor body
1985 300D Turbo 165K. Totaled. Donor Engine. It runs!!!
1980 300SD 311K My New Baby.
1979 BMW 633csi 62K+++? Dead odo

Pull the glow plugs and hook them up accross a battery (hold them with pliers). If they do not glow bright fairly quickly then replace them.

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Jim

Yes they do wear out.

Check out how to test glow plugs on this pictorial

http://dieselgiant.com/mercedesdieselloopglowplugrepair.htm

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1981 300D 147k
1998 VW Jetta Tdi 320k
2001 Dodge Ram 2500 141k
1979 300D 234k (sold)
1984 300D "Astor" 262k(sold)
Mercedes How-To and Repair Pictorials
I love the smell of diesel smoke in my hair

is the lamp comes on a bit after it is started? starts and runs fine even in very cold weather? seems like no problem to me if that is true.

also year of vehicle will help.

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

Thanks for all the replies and response, tom the year is 2002. I will pull em and test on ohm meter.

Keep us updated on what it is.

__________________
1981 300D 147k
1998 VW Jetta Tdi 320k
2001 Dodge Ram 2500 141k
1979 300D 234k (sold)
1984 300D "Astor" 262k(sold)
Mercedes How-To and Repair Pictorials
I love the smell of diesel smoke in my hair

You don't need to pull the glow plugs to test them with an ohm meter. Just unplug the connector and test them at the terminal.

Len

The is absolutely correct!

__________________
1981 300D 147k
1998 VW Jetta Tdi 320k
2001 Dodge Ram 2500 141k
1979 300D 234k (sold)
1984 300D "Astor" 262k(sold)
Mercedes How-To and Repair Pictorials
I love the smell of diesel smoke in my hair