The question is as simple as the title suggests. Does anyone have a good idea what size I should order for the sunroof E clips?

As you may know there are two used on each side as part of fixing the glass to the mechanism, but they are tiny, and being springy have an exceptionally high tendency to launch themselves into the darkest recesses of the car, no matter how careful you’re being.

Unfortunately also, on my vernier callipers the jaws are too wide to fit into the grooves that the clips engage with. I can get that it’s a 6mm overall diameter; I think the pin OD is 4mm; but I’m guestimating if I say 3 or 3.5mm groove diameter.

I realise this is a bit of a specific query - and I could just order several clips in the closest sizes - they don’t cost much. But I thought I’d ask anyway.

Edit - In the meantime I have ordered a couple of little bags of 2.3mm and 3.5mm clips, where those sizes correspond to the smaller, groove diameter. I have an idea 2.3 might be too small, and possibly 3.5mm be too big… going to see if I can find some 3mm ones somewhere.

If you re-cover the sunshade on one side with a PU/ faux leather all the way to the edge then it will slide in the channel without messing around with the E clips. - if we're talikng about the fiddly little clips on the sunshade, anyway

No, not the horrid little bits of plastic with a springy plate on them that ping out and disappear when you take the sunshade out. He's talking about the washer type clips that go on the pins on either side. I normally call them C clips as they are like a washer but with a bit missing.

Indeed. I had all sorts of deeply frustrating and annoying sunroof shenanigans yesterday. This included an unplanned cassette out/cassette in, and an even more unplanned removal of the sunshade and its clips (though they behaved OK).

To be honest I don’t know if they are C or E clips strictly speaking, but it’s the 2.3mm ones we need for the sunroof. They are just too tiny for anyone with normal sized fingers to work with in a properly controlled way.