Ok so i have a 2005 2.0 tdi but when i turn the key the glow plug light will not go out. I have 2 options , turn the key 15-20 times or sit and wait for 5-10 minutes and the light will go off itself. I have so far replaced all 4 glow plugs , put in a brand new battery and had the key re programmed. Any Ideas anyone? Once the engine is warm, if i turn it off and then turn key then the lights will go straight off. Its usually when engine has been standing for longer then 10 minutes.