Having looked at R***, i cant see a "switch" - there is a "Rotary Coupler" at the back of the steering wheel. It seems to be fitted with 3 screws and has a position sensor on one side.
lol - i have just seen.....
CAUTION: Before disconnecting any part of the steering linkage, ensure the road wheels are positioned straight ahead and the steering wheel is prevented from turning.
Unrestricted turning of the steering wheel will damage the SRS rotary coupler.