They have a VW dealer in Red Deer. My Jetta TDI the owners manual recommends a service every 15,000 kms the Stealership wants me in every 8,000km so I kinda do mine every 11 or 12,000. Had mine new since Nov 2010 and I have 52,000+ on it and so far so good. (Love it) I still wish I would have spent the extra and got the wagon. I’m sure Dave J drives the wagon TDI. The only down side is I find the service's cost a lot more then other cars I have owned.
Clive - I only let it idle all day when the temps go below -10c