All the dash will light up like a Christmas Tree. All you need to do is turn the steering wheel lock to lock to clear it or just take it for a drive. Any battery that fits for size and electrical requirements (Halfords etc.) will do as long as it is vented.

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Sent via Telegraph Wires using my Morse Key.
2021 X5 xDrive40i
2015 X5 xDrive35i MSport
(Traded) 2013 X5 xDrive35i