hi,
recntly but a 03' s60 2.5 AWD, can someone Explain how to activate the alarm via the key fob and how to open the trunk via the fob and what is the Yellow for

thanks

the fob in the photo

 

to open the trunk you will need to press and hold the trunk button, the alarm is activated when you lock your car, if you want to use the panic alarm that is activated with the red button, the yellow button activates the parking/reverse lights as well as lights on the side view mirror if your in a dark area with no lights to help you see as you approach your vehicle! I hope this helps, if the remotes not working then your battery needs replacing