Mine has none either, in fact it didn't even come with a switch on the driver's door to lock/unlock the doors. Not sure there's an easy electrical way round this either as the mechanism to release a locked door from inside by double-pulling on the door handle is purely mechanical, so I'm assuming it's a different setup on deadlocking vans and this mechanism would have to be replaced on all doors apart from the tailgate. I'm going to have to put some thought into what can be done about this, I'm waiting in for a delivery and then heading off for a long weekend in Wales and will now be a lot more nervous of leaving the van unattended now I know how quick it would be to get the van doors open!