Shower unit leaking from screw

[Varogast]

Hello, amateur DIYer here.

My shower has recently started slowly dripping from the unit / bar, right where there is a screw fitting. (photos attached)

My best guess is an internal washer has failed, but unsure whether this screw has any other purpose and shouldn't be removed?

Would be grateful for any advice.

Thanks in advance

 

[Deleted member 120897]

Could be the cartridge inside that has a failed o-ring. You could try and remove the cartridge to investigate further.