A dashboard toy might do the trick! We've made several models in recent years that play soothing lullabies, have twinkling lights and also features interactive activities to entertain your baby. What you might find most helpful is the toy's remote control feature, which lets you activate the toy from your driver's seat, keeping your baby content while you're behind the wheel.
On car trips, short or long, take along a few favorite infant toys and books. Also, try playing music in the car, which might help your baby enjoy being in his seat a little more each time.
By the way, your baby's resistance to the car seat is not unusual. Some babies take a while to get adjusted to being restrained. Eventually, the routine of going for car rides and being restrained in the car seat will feel more natural to your baby.
Our parenting advice is given as suggestions only. We recommend you also consult your healthcare provider, and urge you to contact them immediately if your question is urgent or about a medical condition.