Chris, consider this,
last week, my sis-in-law's E-90 was stolen. They just arrived from kampung 'round midnight and they woke up in d morning, the car was gone.
They broke into d house and stole the car key and just ran away with d car. Likewise on the car jacking, they just take ur key/card and simply drive away.
Immobiliser won't help much nowadays, sattelite or RF tracking is the way to go now. After such incident, I decided to renew also my oter car's tracking system. Just in case...
But the question is what and where to get such services?... Pls share since my UDM also does not have one yet.