Smart 451 Steering Angle: Wheel vs. Tire Angle

Hello everyone,

I am currently working on my thesis and need to convert the steering angle data I'm retrieving from my Smart (451 cdi, year 2012) via the CAN bus.

The CAN frame with the ID 0xC2 contains the steering angle information.
I would like to derive the angle at which the tires turn during steering from this data.

Has anyone ever had experience with something like this before?

Thank you for your time and assistance.
Michi.

Steering wheel angle * Steering gear ratio = Wheel steering angle.