Possible water ingress from over cab Dometic

It has been suggested that I remove the frame from around the Dometic over cab window so that I can check if it is leaking or if I just had frozen condensation inside that thawed. I have loosened the screw covers but I cannot get said covers out of the frame to give me access to the screws. Does anyone have experience of removing them?

If anyone is interested, the problem was caused by the window frame cracking in the top left hand corner. No idea how or why it happened but it now has to be replaced

Thanks for the update, glad you got sorted

Not sorted yet but at least we know the problem.

Replacement window, £1175 + fitting + VAT

Ouch

is the frame aluminium or plastic ?

Hi Avontourist,

Sorry for the delay.

It is plastic.

If the crack is hairline would it be possible to seal it with Captain Tolleys Creeping Crack Cure. a weird name for a product but I have used it on several occasions with total success from leaky window frames to fixing cracks in china.

Thank you Johno for your tip.
On checking the inner cover I discovered that it had also been broken, glued and masking tape used to hold it together. I assume that the damage was done during manufacture of the van and someone covered up their problem and made it mine. So on reflection I will have a complete replacement fitted and start afresh. I can keep the Perspex as a spare as that is the bit I would expect to break.