After owning a Passat for 4.5 years I got pretty used to have my car give a short beep when I locked / unlocked the doors. After several months with the Volvo, one of the few things that bugs me is that I rarely know if the doors are locked after I press the button on the remote. Obviously there are the flashing lights, but I find fairly often that my lights don't flast even though the doors have locked - and its difficult to see the lights in the sun.<p>So: Is there any easy way to make the car make some sort of sound when I lock the doors (other than the sound from the locking mechanism)? I'd even be willing to install an alarm, but it would have to work with the factory remote control. Any options?<p>Thanks!