Dorothy Parker wrote:
he has a lengthy previous record of assaults, gbh, burglary, theft, posession of drugs, affray, public disorder, criminal damage. ... He has punched me in the face before and I foolishly took him back despite being warned that his violence would surface again.
Dorothy, Dorothy, Dorothy. What were you thinking???
Regarding his defence, it's irrelevant if you knew the doors were locked or not. The fact is, he intimidated you, and with his history and if you get a decent lawyer, he'll go to jail. I wouldn't think ramming your car was attempted murder, but it's violent and that's not going to look good for him.
Get a good lawyer and don't go out with people like him again, for Pete's sake!