Drupal Commerce: Narrow down products by Year, Make, then Model for car parts

What I want:

User goes to site. Chooses Year, Make & Model of their car. Views then lists ONLY the products he or she will need.

I have it working to a point with taxonomy, but problem is, like the Mercedes Benz 300 D: 1976 has a different size than 1977 and up. Since I have all years down for mercedes, this one shows BOTH sizes, where only 1 is needed. But other years of Mercedes has those sizes. Need to narrow that down.

Best practices? Is there a better taxonomy module to do this? Should I even USE taxonomy, or perhaps there's a better way to do this?