Today I set about cleaning up a mess of white corrosion on the battery and also in the battery box. S40 2005
Removal (and refit) ofthe battery was no problem however I struggeled and eventually gave up trying to remove the battery box. There is an electrical connection to the underside of the battery box itself and I was unable to free it.
Any idea what that connection is for? New one to me.
Anyway I ended up cleaning with the box still in place. Use a solution of Sodium Bicarbonate in warm water and a stiff brush - works a treat, followed by liberal plain water cleanup.
thanks, Martyn