Your car has an infra-red ( IR ) system. The newer MB's have radio frequency systems. The difference is that IR's need to have the transmitter/key aimed at the vehicle (similar to a VCR or TV). The newer MB's use RF (radio frequency). This works at a longer range, and doesn't require the transmitter to be aimed at the vehicle. If you decide to go with an after-market system, make sure the installer knows what he's doing.