This problem has started just recently and it now occurs every time the car is locked. I have tried using differnt remote keys to lock the vehicle but the alarm is set off each time.
Why does the Alarm sound shortly after doors have been locked using remote key. on 1998 Mercedes-Benz ML320
sounds like you may have a faulty door ajar switch,or trunk,hood switch.
You were correct. My rear passenger door lock has a faulty switch. Thank you for your help.
Your very welcome!