Hello everyone, newbie BMW owner.

Looking for some help - can anyone reccomend a visible car theft deterrent I.e stoplock, etc that fits a BMW steering wheel? Know the car had excellent security but want a visible deterrent. Also my car only has the aux input in the rear for iPod connection - can you retro fit anything that is a better way to use an iPod? I have a 530d m sport 2008.

Any help will be appreciated!!!! :-)