If you have a cab radio that has a secure code have it to hand before you start
If your alarm has special instruction for resetting? either have the instructions or contact the supplier/installer
I encountered no problems and I had a residual voltage feeding back to the cab due to a Sterling BtoB being installed.
Be absolutely sure you have the correct replacement battery! physical size capacity and terminal configuration.
Remove the cab carpet and there is the floor panel with coin turn fixings a 50p piece is good, just half a turn on each
[You must be registered and logged in to see this image.]Now you have the battery box cover, just remove the two nearest 13mm bolts.
The lid hinges up and then pull it away from the hinges towards you.
[You must be registered and logged in to see this image.]This is what you will find
[You must be registered and logged in to see this image.]Now remove the battery clamp 13mm nut
[You must be registered and logged in to see this image.]Now disconnect the Negative clamp, no spanner needed here but best to remove the cable out of the way altogether by removing the 13mm bolt to the chassis also.
[You must be registered and logged in to see this image.]Now remove the terminal cover at the +ve end
[You must be registered and logged in to see this image.]Remove these two screws and the red plastic doobree lol
[You must be registered and logged in to see this image.]Then slacken the +ve clamp nut 10mm ring spanner and lift the lot clear
[You must be registered and logged in to see this image.]Pull out the old battery
[You must be registered and logged in to see this image.]Present the new one
[You must be registered and logged in to see this image.]Be sure to remove both transit plugs
[You must be registered and logged in to see this image.]Reverse the whole procedure Amen
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Subject: X250 Cab battery change in pictures 
