You also can't ship an airbag legally and cheaply if you find one for sale on eBay. Not that the letter of the law stopped anyone.
When I swapped out the 4 spoke steering wheel for a 3 spoke on my w203 I had to be careful to avoid the Takata airbags. MB installed both Takata and Autoliv airbags in it's cars at the same time and the only way to know which one you have is to look up the vin or read the fine print on the back of the airbag.
https://www.mbusa.com/mercedes/recall