MG RX5 Handbook page 262

Turn off the ignition switch and all the electrical equipments
in both vehicles, and then follow the instructions below:
1 Connect the positive (+) terminals of both batteries
with a jumper cable. Connect the negative (-)
terminal of the donor vehicle battery (A) with the
other jumper cable to a good earth point (the engine
mount or other unpainted surface, for example) on
the disabled vehicle (B), at least 0.5m away from the
battery.
2 Check whether the cables are clear of moving parts
of both engines, then start the engine of the donor
vehicle and allow it to idle for a few minutes.
3 Start the disabled vehicle (the ignition of the engine
should not exceed 10 seconds). If the disabled vehicle
will not start after several attempts, it may need to be
repaired. Please contact an MG Authorised Repairer
for an overhaul.
4 After both the vehicles have normally started, allow
the engines to idle for more than 2 minutes before
shutting down the engine of the donor vehicle and
disconnecting the jumper cables.
246
Emergency Information
5 Disconnect the jumper cables. The disconnecting
DO NOT switch on any electrical equipment in the
powered vehicle until the jumper cables have been
disconnected.
process is opposite to the connecting process, i.e.
first disconnecting the black negative jumper cable
from the earth point of the disabled vehicle.
IMPORTANT