Time for new battery on nov 2004 3.0d? 50,000 on clock


Hi all, X5 3.0d wouldn’t fire up for the first time since I owned her…did so on second attempt though.
What has changed in the last few days, is temps have suddenly dropped here from about 19C to 10C,anyway being a diesel I always leave key in position 1 for about 5-10 seconds before start-up (apart from when I know engine is warm).

When I got home after the 'incident' and a 20min drive, turned off switch,took key out, waited a minute and then fired her up again first time.

So is this my battery or are we looking at glow plugs and starters motors or fuel pumps and more x5 gremlins?


What this glitch has done is get rid of the annoying fan/heater/aric con automatically coming on as soon as i start the car?