Nope I'm pretty sure you can't, you can spec a leather instrument panel but it's not the same as the full leather option on the M cars. Full leather isn't an option for the non-m versions (well possibly through bmw individual but you'd be paying a massive premium)
Officially full leather adds:
- Upper door panels in Walknappa Leather (Black).
- Instrument panel/dashboard in Walknappa Leather (Black).
- Lower dashboard (centre console/glovebox etc) in Merino and Walknappa Leather (Upholstery colour/Black).
- Sun visors textured/anthracite.
- Rear parcel shelf in anthracite.
Pic of a standard leather:
Pic of full leather (you can see the difference with the whole lower dash/top dash and doors.
Bmw website shows otherwise