Bluetractorman

My 2008 galaxy reckons it's 38 degrees today in west sussex, it's not. More like 16. Also the air in the car was too cool and need to set the internal temp to 23 to feel comfortable. Is this simply the outside air temp sensor failing? If it is, where is it located and will switching it for a replacement be a straightforward job? Can it be tested? Very grateful for any advice. Richard

Rear NS door not locking/unlocking. If I keep my hand on the door lock inside handle when I press the key fob to lock/unlock, the door lock handle twitches but doesn't lock or unlock. Therefore there's definitely power getting to the lock but it's just lost its oomph. What next, is it straight to stripping the mechanism out of the door and servicing/replacing. Thoughts? Slightly dreading getting the door apart.

Perhaps should have made clear it's a 2008 registration.

Can anyone please tell me where the cabin air filter is/how to change it, in this model?