FYI -- BMW has updated and improved the wallpaper images at bmw.com. These images are more photo-realistic and include all the latest M Sport visuals for each model (including xDrive). Here is a direct link to the configurator:
When you download a wallpaper image, the default Model=3A51 (AG code for European 328i sedan, from the Pricing & Ordering Guides). This code is part of the URL in the browser, so you have to edit it to display the other models. You can also add or delete option codes.
The examples below are for an M Sport configuration with the URL changed to Model=3B93 (USA 335i xDrive sedan). Note the USA foglight deletion, USA amber side reflectors, and xDrive emblem on the rear deck. Example model numbers include:
3A51 European 328i sedan
3A53 USA 328i sedan
3A91 European 335i sedan
3A93 USA 335i sedan
3B51 European 328i xDrive sedan
3B53 USA 328i xDrive sedan
3B91 European 335i xDrive sedan
3B93 USA 335i xDrive sedan
This is now a better place to check out the M-Sport colors.