Rotate an object with a constant tilt

For my racing game I want to make the steering wheel turn as the vehicle turns. Problem is, The steering wheel is tilted 48 degrees on the z axis.

I need to preserve this tilt while rotating the steering wheel left and right.
Heres my code so far:

public GameObject SteeringWheel;
private Quaternion Tilt;
Tilt = Quaternion.Euler(0, 0, 48);
SteeringWheel.transform.localRotation = Quaternion.Euler(0, Input.GetAxis("Horizontal") * 180, 0)

it seems that is just ignoring the 48 degree tilt. I feel like I’m making a simple mistake somewhere, so I apologize if this is a stupid question.

I currently have the same issue, please answer if you ever got any solution after 4 years!,i have the same issue, please respond if you ever got a solution after 4 years!