Bouyed by my success (I hope - no obvious leaks) at changing the gearbox oil pan & filter + mechatronic sleeve, I'm now looking at swapping out my very rusty air reservoir. I have a nice shiny new one from Dan (thanks Dan). The workshop manual says:

Quote:

The air line must only be disconnected by removal of the Voss connector. Do not remove the
air line retaining boss from the air suspension reservoir. Failure to follow this instruction may
result in damage to the vehicle.

Break the Voss collet to remove, attempting to slide the collet from the air line will result in
damage.

Whilst I haven't removed a line from the reservoir, I have on several occasions removed lines from valve blocks and air-springs without any drama, including re-using the o-rings.

Recently replaced mine , not easy !I jacked up all four wheels off the ground from the fully raised height. There was no problem releasing the pipe leading to the contraption at the front , how ever that control unit mounts fell apart as I removed it to get at the mount bolts for the tank. Abit of a headache getting at the rear mount bolts as the plastic box had to be prised away to get them.
The biggest problem is getting everything back when your on your back , I suggest a helping hand , and be very careful joining the pipe to control unit its a plastic thread and can easily be crossed. I had a few rusted parts that took me a bit of time to resolve. Hope that helps.

Thanks both.

@alfapat - mine's slightly different as it's a later model. I think it makes it more straightforward (no control unit). So it's essentially just four mounting bolts and the VOSS connector.

@GraemeS - in the end I had no option but to re-use. It seems fine

I managed this without too much drama though it took a lot longer than it should have due to a siezed bolt on one of the plastic covers (tank cover?) that gets in the way. That meant I couldn't get it out of the way and had very limited access to the rear bolts.

On my car (2009) it's a bit different to the workshop manual. It's just two mounting bolts either end of the reservoir and the VOSS connector. The procedure I followed was roughly:

Tools required
IID Tool or similar
10mm socket and extensions (ideally 1/4") - reservoir mounting bolts
13mm socket and extensions - plastic cover panel bolts
12mm open ended spanner - VOSS connector
Car ramps (or jack and stands)
Decent workshop light or torch
Axle stands - to support the reservoir

1/ Offside of the car up in the air on ramps. Drop to access height (if the car does drop I want it to drop as little as possible)
2/ De-pressurise the reservoir using IID tool (takes a few minutes to complete)
3/ Grab a pair of axle stands to support the reservoir
4/ Remove the bolts from the plastic cover restricting access to the rear of the reservoir to give better access (one is very high up and try as I might I couldn't move it)
5/ Loosen all four mounting bolts on the reservoir
6/ Remove rear mounting bolts and drop reservoir slightly to give access to VOSS connector. Support on axle stand.
7/ Carefully loosen VOSS connector - there will still be pressure in the reservoir. Leave it to exhaust completely (takes a few minutes)
8/ Remove VOSS connector
9/ Place axle stand under front of reservoir and remove front mounting bolts
10/ Discard old reservoir
11/ Refitting is essentially a reversal. Use the axle stands to get it in roughly the right place but with access to the VOSS connector
12/ Loosely attach reservoir front mounting bolts leaving back on axle stand
13/ Carefully align and tighten VOSS connector to reservoir
14/ Raise rear of reservoir to locate rear mounting bolts - access can be quite restricted and it's very difficult to see what you're doing. One of these bolts put of a real fight.
15/ Secure all mounting bolts
16/ Re-enable EAS on the IID and test

Ah ok , I did think yours might be different but didn’t check , sounds a lot simpler than the older model, so I look forward to my upgrade whenever that might be.