Keyless entry & Start/stop

[Preston-m3]

My SL55 has this option but the last owner didn't have the card key so am I correct in thinking I cant use either function without one? If so what is the most cost effective solution?
cheers

 

[richard]

Early cars had keycards, MY2004 onward it was built into the key. So maybe you already have the right parts and it doesn't work, or maybe the keycards have been lost

There is a sync procedure to sync the KG functions with a new key or card - but I can't remember it as I used Star Diagnosis last time rather than the manual sync process (sorry)

Richard