How to rotate car without using transform

Hi.

I'm making a clone of vigilante 8 second offense. Now i need my AI car to aim its weapon to enemy's car. This car doesn't have turret that can rotate freely at any given angle. So, to aim its weapon, the whole car body must be rotated to the enemy. My car is simulated using wheel collider and moved by assigning WheelCollider.motorTorque and WheelCollider.steerAngle. I encapsulated those functionalities into a class called VLCarMotor (c#). To rotate, the AI car maxTorque must be > 0 (the car must be accelerated).

The AI car is simulated using WheelCollider and its movements looks like a real car. It means that i cannot using a simple transform.Rotate to rotate this AI car to the target. I want the WheelCollider.steerAngle do this. How to measure the WheelCollider.steerAngle and the WheelCollider.motorTorque to make the AI car rotate its heading to the target?

I know about Steering Behavior and the AI car can seek, arrive, avoid obstacle and followpath. But i have no idea how to rotate the AI car to the target while the target is close to the AI car. Could you tell me your ideas and solution to solve this problem? Thanks.