This is an ancient thread, but I'm just popping this here as very little comes up when doing a Google search.
We've got a 2018 UK NV200 Tekna camper conversion, with the factory fitted alarm, and the ultrasonic sensors can be a bit of a pain - not so much when you're *in* the vehicle, but when you leave it.
When you're sleeping within you can just fully lock/unlock via the front panel rocker switch - if you do this, the sensors are disabled - if you need to get out, you just open the sliding doors as normal from the inside. That bits fine.
However...when you leave the vehicle the sensors can be set off by, for example, a moth/large fly being trapped inside - quite a likely thing when used as a camper van. The procedure, to leave the vehicle with the ultrasonic sensors disabled, is:
- Turn the ignition on to the second position to turn on the electrics
- Turn the ignition off again and remove the key
- Within a few seconds of the above, hold down the alarm button on the dashboard until the LED on it blinks twice
- Leave the vehicle, close the doors and lock it as normal using the keyfob
We found out the hard way that it's *likely* you'll get something trapped inside that will set off the alarm when you're in a campsite environment

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