Service plan, maintenance146Protection ofelectronic componentsIn order to avoid the breakdown ofelectronic components within the electricalsystem, never disconnect the battery withthe engine running. Never start the enginewhile the battery is disconnected (e.g.when using jump leads).The battery must be disconnected from thevehicle before being charged: firstdisconnect the negative cable and then thepositive cable. The polarity of the battery,i.e. the connections for the positive andnegative cables, must not beinterchanged. When reconnecting, firstconnect the positive cable and then thenegative cable.To avoid damaging the vehicle, do notmake any modifications to the electricalsystem, e.g. connecting additionalconsumers or tampering with electroniccontrol units (chip tuning).Disconnecting / connecting the batteryfrom / to the electrical systemDisconnect the battery from the vehicleelectrical system before charging: Firstdetach the negative and then the positivelead. Do not reverse the polarity of thebattery, i.e. do not confuse the terminalsfor the positive and negative leads. Whenconnecting, start with the positive lead andthen connect the negative lead.Vehicle storageIf your vehicle is to be stored for longperiods without use, we recommend youconsult your Vauxhall Authorised Repairerfor advice.9 WarningElectronic ignition systems generate veryhigh voltages. Do not touch the ignitionsystem; high voltage can be fatal.