On my car the owners manual says: "0" = Off position, steering locked when key is removed. "1" = Garage position: Ignition off, steering free with key removed & my radio works. "2" = Drive: Ignition on, steering free, side lights automatically turned off; not possible to remove key.
1969 280SL,Signal Red, A/T, P/S, A/C, Both tops. Ret. engr. 1967 230SL - Sold