All Teslas come with Autopilot. It's adaptive cruise control and automatic steering that will keep you in your lane. It's awesome, and I love it.

"Enhanced" autopilot, which currently is $6000 extra, is automatic lane change, automatically taking exits, summon, and automatic parking.

The automatic lane change is nice, but it fails too often to be worth thousands of dollars. All the rest of the features are basically party tricks.

If I could have automatic lane changes for much less, I'd happily pay extra for it.

Edit: Enhanced Autopilot was $7k extra when I bought my 2nd Tesla, now it's $6k extra.