General notes on disconnecting battery

2013 Mini Cooper Countryman, Standard TransSECTION General notes on disconnecting battery
WARNING: This page is about a different car, the 2011 BMW 750xi, 2011 BMW 750Lxi, 2010 BMW 750xi, and 2010 BMW 750Lxi. However, it is still accessible from the selected car via links, so may be relevant.
  • Do not disconnect battery leads and leads from alternator and starter motor while engine is running.
  • Vehicles with IBS on battery negative terminal:

    Do not under any circumstances pull/lever off pole shoes by force.

    Do not under any circumstances release socket-head cap screw of IBS.

  • Disconnect terminal of BATTERY NEGATIVE LEAD  from vehicle battery. Cover battery negative terminal(s) and secure.
  • When work is carried out on the electrical system, faults may be caused in the fault memories of some control units when the battery is connected.
  • When installing battery terminal: Tightening torque 61 21 1AZ .
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.