Ok have been possibly wasting alot of peoples time on the forum,re my lazy start issue, I decided to take a look at my battery (first time in a couple of years) and noticed as per pic the discoloration of the plastic at the top and what looks like a leak and formation of a crystalline layer. Either way I took it out, put it on a ctek 5.0 Recon option and then on charge.... but would you say definitely swap out?.

I reconnected everything , nipped up the earth cable etc and so far so good...touch wood seems to be ok , reason I took it out was to put in a temp battery see if my lazy start was any better but seem to have been barking up the wrong tree as still had issue (and either way my amp draw test when done a while back showed 400a draw when starting so that could well be an issue too) ps the bosch is closing in on 5 years old . my driving style is max 10miles a day with 3 stops/starts during this total mileage done....and progressively during the week my starting gets slower and battery seems to get weaker so have to charge up again..then back to 'normal' lazy start.

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E53 X5 3.0d SUV prod.date 11/2004 eng.variant M57N Europe Right hand drive N