AppleCare+ coverage Apple MacBook Pro 13 inch

There will be a cost associated with fixing your dent and scratches on the case. However since you have AppleCare+, and assuming you haven't used 2 instances accidental damage before, you will have to pay a deductible that is less than if you didn't have AppleCare+.

AppleCare+ (similar for iPhone and iPad, each incident of accidental damage) for Mac will carry its own price tag. Screen damage or “external enclosure damage” will run $99 per incident, while other damage, including water damage, will run $299. Users receive coverage of two incidents under AppleCare+, and after the two incidents have been used up, out-of-warratny replacement rates will apply

If you have AppleCare+ it will cover a large portion of accidental damage.

https://www.apple.com/support/products/mac.html

In or out of warranty you can get a free over the counter 'Apple Service Diagnostics' test

Genius reservation http://www.apple.com/retail/geniusbar/

on-line https://getsupport.apple.com/

check warranty https://checkcoverage.apple.com/