As it turns out my car battery was flat. Interesting thing though after battery replacement, everything worked well except my remote still does not unlock the car. I replaced the batteries in the remote, tried synchronising as per manual but no go. My spare remote works well but the other.
I noticed there are two little metallic contacts in the battery compartment - one sticks out a little and the other is flat. I'm not game to open the other remote to see just in case it stuffs up too. I'm about to go on a trip so can't take any risks.
Does anyone have any ideas as to why the remote does not work other than it too has died. The red light still illuminates when the button is pressed though. CONFUSED!!