So lately I have been building stuff in Rage that could potentially benefit Eclipse as I love it here! I have built this functionality and sent details across to NBDY.
https://streamable.com/ab2v5
This feature needs a lot more thought than just the development side though. I personally believe it should only be possible for a few seconds until you get out of breath and you can only push it X out of times before you start using lots of energy. You should only be able to push your own vehicles you have access too and that the feature would only be available if you sent a request to a mechanic with no response. So the idea is a message would appear- It seems a mechanic can't make it out to you, let's give the car a push out the way.