Luftstiver Mercedes W221 4MATIC Bilstein 44-110505

The BILSTEIN B4 air suspension module offers optimum safety and durability. 
Don't be satisfied with less than BILSTEIN if you need OE replacement.

In close cooperation with mercedes-Benz, this BILSTEIN B4 air suspension module was developed for maximum driving comfort. 
The revolutionary design provides damping, suspension and level control in one single part. 
The BILSTEIN B4 air suspension module is available for active and passive systems and is therefore the ideal OE replacement part for a perfect driving experience as on day one. 

Enclosed installation instructions of the manufacturer must be observed!

How to replace the strut you can see in this video. 
It is essential to act according to this installation video: https://youtu.be/iqUmmreGQwU

Can be installed in the following vehicles: 
Mercedes-Benz S-Class W221 Code Z07 (2005 - 2013) 

Original spare part number: 
2213209713 ,  A 221 320 97 13
2213200971389 ,  A 221 320 97 13 89
2213205113 ,  A 221 320 51 13
2213209513 ,  A 221 320 95 13

OEM Bilstein:
44-110505 , VA5-B050