My G3 (my colleague has one, and I drove it again this weekend) is making a cracking sound with the SD card.
Everything was perfectly greased, but it still squeaks.
However, it can sometimes be resolved by opening and closing it again, and certainly by applying pressure to the glass in the cracking area.
It doesn't quite fit with the image you're trying to project.
I hadn't found the real cause until the sale, and the colleague is immune to noises coming from the car

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m;