I bought a replacement from FCP Euro in Sept of 2021; It's working fine today. Number Mercedes 219820322664 Manufacture Bosch # F005V00818. It is used on 308 Mercedes models up to 2012. It has the beeps when you lock the car. It hasn't been laying on a shelf for the past twenty years as that Mercedes number is a replacement number for the original AND it is plug and play. If you purchase from FCO Euro it has lifetime replacement. I put it on my SRT6 as that car only has 16,000 miles and I try to keep it nice for car shows. The Limited I have has been without a siren for ten years 180,000 miles and I have no problem with that either.