I also had this problem with my cdi220 .I can confirm it was the rain water drain under the bonnet. I used an air line to clear out all the debris.
Ian
August 2009
The problem was in the rain water drain in the hood.
Open the hood, take off the plastic door tha's access some electronics parts, and deep have a rubber nose thasts are bloocked, take off this part and wash.
sometimes the tree has dropped some thinks in the car that block the rainwater drain hole
need more info?
juanjo
January 2009
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