Your approach is wholly impractical on its face, actually.

So, let me get this straight: You laid down tens of thousands of dollars on a vehicle that you only post-purchase read the manual of, and you're raising this as some sort of standard people should follow?

Honestly, asking the right questions (and test-driving) upfront should be what lands the purchase, and not discovering the folly of purchasing a car with such ass-backwards issues you only discover after the fact when you bother to dig out the manual.

You drove it off the lot after you bought it, right? Or did you read the manual in the lot right after signing the papers locking you into the purchase?