Sorry did you mean whales as the place. or was you refring to the size of the 5 series.
prob fan switch faulty. buy look of coolant bottle in pic looks like in might of got hot before
i ment as in size and the water was as rusty as hell so i gave it a good flush out and refilled with anti-freeze in it this timetheres no over heating issues with it,no mayo in filler cap and isnt using water/oil just a bit tappety like always lol