Hi. I Didn't have keyless entry with mine. But I do have to hold the lock button to get the mirrors to fold in. One thing I have noticed is that they unfold when you unlock the car. Not when you start the engine. This is actually a bit annoying as if you just go back to the car for something but are not actually going anywhere you then have to press and hold again to fold them back in.
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I think that you can fix this with the vcds cable.