I am looking at placing order for new Allroad Limited Edition model in UK and it comes standard with 19" wheels and 40 profile tyres. Car has no cost option to be delivered with 18" x 10 spoke wheels and all terrain tyres (which I think will be better in snow etc). This 18" option also comes with enhanced underbody protection. Asked dealer what the enhanced underbody protection is but he has never been asked this before and has not come back to me with any info. I think it may be a stronger under engine guard but not sure. Any help appreciated. regards