disco 2 sls

What do you mean by "dumps the air"? As in the suspension dropping onto the bump stops or a "phissssst" a few tens of seconds after switching off but the suspension remains up. Mine does the latter and when I asked it's "normal" behaviour. I just wish they'd mention all these odd noises in the User Manual.

The SLS completely deflates when in "limp-home" mode. I would suggest you take the vehicle to a Land Rove specialist with Autologic or T4 diagnostics who can read the FAULT memory for the SLABS ECU. Typically, a faulty height sensor will cause the vehicle to go into limp home mode.

Dave Liquorice wrote:

It could be a faulty sensor, but I agree with the other poster, you really need to get it into a well-equipped independent specialist to find out.

David