creator

03 c230 sedan
front doors not setting off alarm when opening after being armed, but rear doors working fine.
what can be the problem??

creator

now fl door and rr door not activating alarm but if i set off alarm then arm again by pressing lock on key fob all doors work triggering the alarm when opened. so heres basically wats happening:
press lock = fl and rr door trigger doesnt work but fr and rl works
press lock + intentionally trigger alarm + press lock again = all doors then work and trigger alarm.