Guys, can you take a look at the picture and tell me what this "hose" or "tube" is? and is it dangerous to leave it damaged like that? i think it's only the tissue that is involved, but does it provide more reinforcement?

kindly advise, thanks.

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BMW X5 3.0si 2008
Premium Package
Light Package
Navigation
Reverse Camera
Rear Sensor (retro-fit)
Comfort Access
Spare Wheel
Power folding mirrors
Voice Control w Bluetooth
Power trunklid

BMW X3 3.0i 2006
M Aerokit
M Sport Package
Navigation System
BT Handsfree
Xenon HID

BMW X5 3.0i 2001 --- SOLD