Hi......i Have Just Purchased A 1996 E300d And Only Got The One Remote Key (metal Key Flicks Out) And This Only Has The One Button That Turns Off Alarm/immobiliser (red/green Lights In Interior Mirror)........my Neighbour Use To Have 2000 A-class And Recently Found One Of The Spare Keys Which He Gave To Me....the Only Difference Between His Key And Mine Is He Has Two Buttons One Showing A Lock Locked And The Other Showing A Lock Opened. Would It Be Possible To Have His Key Re-programmed So I Could Use It As A Spare........(but I Would Still Have To Get A Compatible Metal Key)