Where can I find out which tyres are approved for my vehicle?
In the registration certificate part I you will find the permissible tyre size under point 15 (15.1 and 15.2). Only one tyre dimension is mentioned here. However, this does not mean that only this one fits the vehicle and is the only tyre size allowed.
For vehicles for which a COC (Certificate of Conformity) is available, additional wheel/tyre combinations may be approved. If the desired wheel/tyre combination is neither on the registration certificate part I nor on the COC, this can only be done by an individual inspection by an authorised test centre (TÜV, Dekra). A manufacturer's release/certificate is required for individual acceptance.
For vehicles without COC a data sheet for the vehicle type may be able to provide information.