Don't know if this has been posted before but here goes. The car is a 2016 228 ixDrive. If you get in the car and start the engine the air bag light goes off as expected and stays off as it should. If you stop the engine by depress brake and push start button, then release the brake and press the start button again to cut off accessory power, again everything is as it should be. However, if you cut off the engine but leave the accessory power on, say to listen to song before getting out of the car, after about 20 second the air bag light comes on with an error message displayed, "Restraint System". If you then cut off the accessory power and then restart the car everything again appears normal. Anyone see this behavior?