WARNING: This page is about a different car, the 2013 BMW 550i GT, 2012 BMW 550i GT, 2011 BMW 550i GT, and 2010 BMW 550i GT. However, it is still accessible from the selected car via links, so may be relevant.
2222502 Sprayer MW
In conjunction with: HRS spray gun 81 45 9 429 217 and cleanser 83 19 0 447 911
NOTE:
Spraying device for cleaning the evaporator [Released]