Mercedes E300

friend of mine has a diesel E300 and was looking for an alarm he has keyless entry already and a button in the car so i thought that it would be ease to do the alarm and keyless... Then i read his manual and it says that the Factory immobiliser is armed and disarmed with the key fob. not a redio key so how does it work if i go to do an install.. Thanks

i was thinking if i unarmed it with the key. then the alatm would do the locks and the factory immobiliser need never be used

anybody???

what year is the benz?

1996 its the 96 and on model (210)

are you doing a remote starter and alarm or just alarm????  a factory immobilizer is something like a chip in his key for starting purposes. I'm not sure if i read your post right, so please post more info. (model alarm)

ok its just alarm.   the immobiliser doesn't work by picking up the key in the ignition   it works when you lock the car remotely it arms and disarms when you open remotly. i.e. if he doesn't lock the car with the key remote the car can be started   if he does it can't

most alarms have an option for a starter kill relay. that would do the same thing wether you have that as a factory option or not.