Hello Everyone,

This Strange Problem has happened couple of times in Last two weeks. Also this happenes only when it is cold.

This Morning when starting the car I turned the key and waited for the glow plugs to go off for about 5 seconds and turned the car. It was trying to start and after 30 -45 seconds of me trying to start the car the car battery has completely drained.

I then Jump started my car using my friends car.

The question is do I need to replace my battery or my glow plugs.

I drove my car to halfords and they checked my car battery and they said it seems to be OK.

The car is 2003 superb 2.5 TDI and has done 165K. I have own this car for 4 years and haven't changed the battery nor the glow plugs.

Any help or Ideas would be much appreciated..

personally I would be getting the battery checked again

When jump started did the car run smoothly. If yes - then unlikely to be glow plugs - unless they are all out at once (electrical fault etc.) ....... so I would go with it being a weak battery. If the car started and ran very lumpy for a few minutes then you may have a faulty glow plug or two. My money is on the battery.