What will I need to attach this to my '99...
What will I need to attach this to my '99 VW Jetta or my '05 Mercury Sable? Is it universal?
It's universal. You will need crossbars for each vehicle. May be a bit long for our Veedub. Measure so you see how far it will be sticking out in the back or front. Thule has a little online guide for this.