Some of the larger German cities will not allow you to enter unless you have a green certified sticker showing that your vehicle meets local emision standards. Driving in without the sticker can give some hefty fines...:Wow1:
They should give tourists a break to be fair. I've seen a Scania overland truck in North Van, if we nit pick I'm sure it doesn't meet BC safety laws.
Questions - how to VW TDis enter German cities? Haha, couldn't help it...