Page 73 of the owners handbook tells you of adjustment, and leads you to believe that it will "lock" in the desired position. However, mine only tilts slightly then returns to the original position when you release pressure. I mentioned this to Brian M at J Clark Dundee and he admitted not knowing or having heard of any adjustment. I showed him the page in the book, but he couldn't offer an explanation of what BMW were meaning. Maybe its an optional extra.