Where do you lube these things, mine sometimes will not retract other times will not deploy (Drivers Side). I've looked, there are no stones caught up in there a quick spray with 3in1 sometimes gets an improvement but it doesn't last. I suspect it needs some thicker grease but where? Geoff

Original WD40.

I've got into the habit of doing mine everytime I clean it, I've got some fairly horrendous country lanes round here so always give the hinges a good jetwash when cleaning and then give them a good dose of WD40 on and inbetween anything that moves. I can just reach the door handles when laid down next to the car so I work the steps at the same time as spraying. Current
2017 Range Rover Sport SVR
2001 Porsche 911 Turbo
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2013 Range Rover Autobiography SDV8
2007 Range Rover Vogue SE TDV8
2002 Range Rover HSE TD6
+ Many other non LR products

Mine seam not to deploy when I park in one certain car park that has some large pot holes and bumps, each time I go in there they never open, anyone else had this?

It’s funny you should say that. Mine have not deployed twice. Both times when parked on a slope and both road surfaces cobbled and pitted.

I would expect it not to operate in certain terrain response modes, but normal mode?

Can’t seem to find the answer but can they detect uneven surfaces?