I've had them do it for me, but I would say perhaps that was an exception and not the rule. I always say if you have the upgrade coupon it doesn't hurt to ask. If you are really needing the larger vehicle, you should reserve it up front I think. I've had upgrade coupons that I couldn't use only because they had no vehicles in that class to upgrade to (or so they told me) at that time.
The thing to remember is that upgrades are not guranteed. So always reserve the size you must have (for example a family of five should not reseve a compact hoping for an upgarde!)
Our Authorized Disney Vacation Planners are here to provide personalized, expert advice, answer every question, and uncover the best discounts.
Let Dreams Unlimited Travel take care of all the details, so you can sit back, relax, and enjoy a stress-free vacation.