just bought a slk 230 98 I had the top down today and thought I would test the alarm. AFter arming(button on dash blinked) I walked to the car and pulled on the inside handle. Just the likghts flashed, with no sound.....Does anyone know how to make it sound? I replaced the pse pump unit in the trunk due to moisture already and that fixed the locking. Any ideas on this new issue? Thanks.