On my 2010 RRS when I lock the doors with the fob the doors seem to lock, the mirrors go in and the alarm activates yet if yu try to open one of the doors the door opens and the alarm activates.

Why are the doors not locking?

It's probably because you have the remote still in your hand or pocket. The remote fob and door have a 'proximity sensor' to allow the keyless entry system to work. Try locking the car with the remote then leaving the remote fob 20 feet or so away from the car and trying the door handle again.

You can also lock the doors by pressing the little black rubber button on any handle, so long as the remote fob isn't inside the car.

Russ. I'm in the shed, I'll be back in the real world in a minute.

Thanks!

I know about the keyless entry as when i approach the car the mirrors fold out etc, I'll need to investigate further I think.

Thanks for the tip about the black buttons though, I didnt know what they were for

Im having a similar problem on my 06 I don't have the keyless problem as its not on my rrs. When I lock the car my back passenger door doesn't lock. Yet if I deactivate the alarm after I opened the door and set the alarm off and lock it again using the key fob it locks as it should. Any one shed any light on this matter at all.

Still got this problem - I have done this with the fob no where near the car and the rear drivers door opens when it is meant to be locked but when it opens it activates the alarm.

Perhaps you both have the well-known door latch motor failure problem.
http://www.disco3.co.uk/forum/topic33743.html?highlight= 2008 MY Java Black TDV8 HSE

Yip I agree with Paddi if door is not locking It will prob be your latch, they have two small motors in them which screw the lock on when you lock the car they tend to burn out which means you can't lock that door. Try locking the door in question manually from inside the car then lock car with fob, that door should stay locked whither you unlock or lock the car. This job can be done if your a diy'r.
hope you get sorted out.

cheers

Wullie