Which side of the additional damper faces up?
 

Hi all! I am planning replace my rear shocks and all the stuff together with the shocks. I just bought the additional damper from dealer, just wonder which side should be faced up. The flat side towards up or the cone side towards up? Thanks for help!

No one can help? Come on guys!

the pointy side. provides are more stable face against the damper.

Flat side is up and tapers (cone) side is always down.

Incorrect.

Also, the rim just above the tapered side is where the strut/shock boot snaps to.

As Jungerishere mentioned:

Thank you all for help!

Oh well, every one I have ever pulled out (not BMW's) has been the other way up. Shame I was the only one to provide any timely feedback to the OP, until others had an opportunity to come in and say someone was wrong :)

Flat side is designed to rest under the strut/shock mount and that side will have the hole just big enough to fit snug against the piston rod. It supposed to be stationary there. Taper side is designed to absorb impact from damper.

If the bump stop is installed up-side-down, it will move against the piston rod as it impacts the damper. Eventually, the bump stop will become loose on the piston rod from the movement and will wear out fast.

Well received! The flat side towards up and the cone side towards down. As in the pic above, it should be put up side down. Thanks for help!

Hi all! One more question, do I have to release the air in rear ride before removing the rear shockss? Or the rear shocks can be remove without releasing rear air bag?

I would either place a jack under the air spring to take some of the pre-load off the rear suspension, or release the air in the spring.

If you try to get the bottom shock bolt out without taking the pre-load off the rear suspension you will have issues

You don't have to do anything with respect to the rear air shocks other than pull the fuse for the pump.

BTDT earlier this year with my rear shocks. Pretty easy job.

BTW: I replaced the rear shock mounts at the same time, but it was probably unnecessary as they looked to be in excellent shape. One of those 'while you are in there" things. It'd suck to have one fail and have to do the job over...

Yes, I will replace the shock mounts and additional dampers at the same time.