Hi My auris 2.0d4d has started having problems on a cold start. At the last cold snap car refused to start. I called the aa out and they got it going, accompanied by a puff of blueish/grey smoke. Dealer checked Battery and determined glow plugs to be at fault. Replaced under extended warranty. Car been ok for a few weeks until last night, started on 3rd attempt and same again this morning, again accompanied with blueish/grey smoke that stops once car is running. Warm starts ok, Oil levels good,