Early in the year, i occasionally got a fault pop up on the air suspension.

It seemed like it was always when it was wet outside-its not done it since June, but then again the car hasn't been driven in the rain since then (not has much rain here in France).

On that basis, i wondered if it was one of the height sensors getting damp and if so, is there anything I can spray/put on the connector under the car to waterproof it?

There are a few waterproofing aerosol sprays.... I had a demo of one that was hugely impressive.... no idea how but they sprayed a light bulb and lamp holder with it, plugged it in to an RCD socket, turned it on and dropped it in a bucket of water! It stayed lit and didn't trip.... I'll try to find the stuff....failing that try WD40 or a hot glue gun? It has worked for me.

Any non-conductive maintenance spray such as Duck Oil (used widely on electrical connectors on boat engines).

Acrylic lacquer also works - good to spray on bolts exposed to the weather and the FBH fuel pump.

Electrical tape also works.

Heatshrink also. 2015 Range Rover Autobiography 4.4 SDV8

I use Electrolube SGB Grease G2X on contacts of mains garden light connectors.
(These are also wrapped in self-amalgamating rubber tape).
It seems to work most of the time when water gets in due to capillary action.  “If it ain’t broke, don’t fix it” -where’s the fun in that?

Nyogel 760G is the LR approved solution (you can get it in 5g sachets with a LR part number), mainly used to prevent contact fretting but also prevents water ingress (if you use enough of it!) due to it's high viscosity.
Obviously make sure the housing is clean & dry and there is no corrosion on the contacts before application.

S60R wrote:

There are a few waterproofing aerosol sprays.... I had a demo of one that was hugely impressive.... no idea how but they sprayed a light bulb and lamp holder with it, plugged it in to an RCD socket, turned it on and dropped it in a bucket of water! It stayed lit and didn't trip.... I'll try to find the stuff....failing that try WD40 or a hot glue gun? It has worked for me.

As ever amazing help from you all.

Thank you.