There's an interesting discussion over on FB Eriba about a pop top seal mod recommended by Hymer.

This involves cutting out 4 bits from the rubber to allow trapped water to drain away.

I can see exactly why they are dping it - I get water trapped under my top. However, I know about it and have my own method of dealing with it that works without physical modification.

Now, it may be that Hymer can argue that this work must be done to maintain a valid warranty, but it does seem odd that the work was done without prior consent of the owner.

Perhaps it would be a good idea to query this if you are taking your van in for service. It may be that not all dealers are doing this - AL are.

When I took our 2013 540 to A.L. for annual service last November, I pointed out to the Service Manager that there was a slight gap under the rubber seal around the front section (the beak) of our pop-top. His response was that the seal is not intended to be water tight and that a gap is needed to avoid a build-up of water under the pop-top, which seemed somewhat contradictory to me. After all, if the seal is water-tight there would be no build-up of water and hence no need to create drainage channels...

The 'fit' of the pop top against the roof came up in some of the discussion related to replacing the seal recently. It came as a surprise to me that my 'beak' also didn't touch and that the roof seemed quite out of shape. It transpired I wasn't alone in this and it seems to me that the moulding stresses for the pop top leave it far from flat. A suggestion that this might be a 'design feature' seems somewhat far fetched to me...

Mind, in saying that, it doesn't appear to present a problem in any way...

Has anyone had any further experience of this as part of their annual service?

Asking as mine is due to go in for one in a few days.

When I took my 2018 Troll in for its service today, in addition to the regular service stuff, AL said they were doing a Hymer recommended mod to the brakes (something about brake dust build up and squeaks) and also the Hymer recommended mod to the roof seal (4 channels cut in the roof seal) to remove the risk of trapped water. Hopefully they’ll do a neat job.