On a D1, you have to lock and hold it for 5 seconds with the key. You may have to repeat this. If you lock a D1 without doing this, the alarm will set. It will go off if unlocked with a key. The extra seconds keeps the alarm from setting. You can also get a new case and buttons for your alarm fob. Mine was getting really worn and I replaced it a few years ago. Works a lot better..
2003 Range Rover HSE with 2008 trim
2010 GLK 350 Mercedes
1990 VW Cabriolet - Lake car...
1997 Discovery SD-7 to put the boat in.