I replied privately as well, but this type of basic service should be under $200, particularly if you don't use an expensive synethetic. For straightforward stuff like this, I would go with Ken @ Import Performance Center if the dealership isn't being reasonable: 905-791-2277
$600 is a complete rip-off. I can't believe they had the gall to quote you that! Who was your service advisor? I know some people high up there (in fact I just had lunch with the ex-owner of the dealership yesterday!), and I'll bring it up with them. That's completely uncalled for unless there was a misunderstanding in terms of what work was being performed (eg. they thought they were also changing the coolant bottle and all the lines or something crazy like that).