Owners/service Manual problems of the 2012 Hyundai Elantra

I bought the Hyundai Elantra 2012 and has been giving me problems. The car will not start sometime till I start moving the steering wheel and the shifter. It has done it to me several times since I bought it and I took it to the dealer I purchased the car and the mechanic said there is nothing wrong. I argued that there is they expect me to leave it at the dealer for a while till they find the problem but the only thing is that it's my only transportation. The shifter locks on me while I'm holding the brake down, I have to use the manual button to unlock it. I notice that when it doesn't want to start and I manually shift the gear to neutral the car starts. The dealer wants me to replicate the problem and I ask my self how??? it doesn't do it all the time. I have roadside assistance and I called them but by that time they get to me I got the car to start.