remotes not remotely working

[Hammers]

Finally found and purchased an e220 coupe and so far, i love it. It will take a bit of getting used to, (like having no glovebox) but every time it hands me my seatbelt i smile.

The only issues are a slight high whoop belt noise at manouvering speeds, and the remotes don't work. Having changed the batteries, it's still not working the doors. Do i have to synch it somehow?

Thanks

Hammers