[montyboy1]

Thanks to all for the info on this thread regarding the muck ingress on the rear door edges of the XC60 models.
As a result I recently contacted Volvo Customer Care explaining what I described as a corrosion-possible design issue needing retro-fit rear wheel arch deflectors part no: 32288517 on my 2019 XC60.
They have been brilliant. After an email or two for more detail they very quickly liaised with my local dealer to confirm costs etc resulting in an appointment for me tomorrow to have the pair of deflectors supplied and fitted FOC.
Clearly this problem shouldn't exist at all but I'm very impressed with how Volvo Customer Support and the dealer have dealt with my enquiry.