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M2 Technical Topics > Mechanical Maintenance: Break-in | Oil & Fluids | Servicing | TSB | Recalls > Moonroof closing

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      08-03-2019, 11:38 PM   #1
MPBK
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Moonroof closing

I noticed something weird:
Say I open the moon-roof by tilting it up at the back.
When I turn off the engine, the moon-roof automatically closes half way. It doesn't close completely, only half of the original opening.
Initially, I thought that was a feature. If you park under the sun, you'd still want it partially open to alleviate the heat build up inside, but you don't want it completely open so to protect partially against dust and a potential rain.
When I get back in and turn on the engine, the moon-roof doesn't return to the original open position. However, if I turn off the engine, again it automatically closes half.
Eventually, it's practically closed. Not completely, but pretty much useless for air ventilation.
Anyone observe that symptom? Or is it a defect in my car?
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      08-04-2019, 07:29 AM   #2
tux2005
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Are you activating the automatic close function while locking the car? BMWs will automatically close windows and the sun roof if you hold the lock button on the remote (or keep pinching the comfort access). If you push the button very briefly then it shouldn't close anything.

With coding you can also adjust how long you have to hold/pinch before things automatically close or adjust which features work (i.e. just windows, include roof and door mirrors).

There is also the opposite feature for unlocking, holding the unlock button or comfort access will start opening windows and roof. This can be particularly handy on super hot days where your car will have baked in the sun for a bit, then you can let it vent a little before you get in.
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      08-05-2019, 11:20 AM   #3
MPBK
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Thanks. That's exactly what was happening.
I figured it out:
When I (normal) touch the door handle, the moonroof auto closes and mirrors fold.
Somehow the moonroof stops before it completely closes. Maybe the system shuts down power before it can complete. But the mirrors fold fine.
When I touch very briefly, door locks, but nothing closes or folds.
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