[waitwhatt]

No. The Model S will break the car for regen purposes if you are in gear. So you will lose speed but get a tiny bit more energy added to the battery. It's better to just go into neutral because that whole process is inefficient.

[kalleboo]

I haven't had the privilege of driving a Tesla, but I have driven a Volvo prototype electric car[0] and it had two modes. One "emulate a petrol car" mode where letting off the accelerator would simulate engine braking (via regen). Then it had a "highway mode" where letting off the accelerator would just coast as if it was in neutral. The highway mode meant you could avoid wasting your momentum on a highway due to slight foot movements in speed regulation.

Do Tesla cars have something like this?

[0] http://www.plugincars.com/volvo-c30-electric