Electric Mode; Extended-Range Mode - Cadillac 2014 ELR Convenience/Personalization Manual

Electric Mode and Extended-Range Mode
The ELR is an electric vehicle with extended range capability.
Plug it in, let it charge overnight, and it's ready to run on a pure
electric charge — gas- and tailpipe emissions-free. After that, the
ELR uses a range-extending gas engine that produces enough
energy to power it for hundreds of miles on a single tank of gas.

Electric Mode

In Electric Mode, the ELR will not use gasoline or produce tailpipe
emissions. During this primary mode, the ELR is powered by
electrical energy stored in its high voltage propulsion battery. It
can operate in this mode until the battery is depleted to a prede-
termined level.
Electric range is affected by colder outside temperatures. During
colder months, the energy needed to warm the vehicle's cabin
and high voltage propulsion battery can cause the vehicle's elec-
tric range to decline. See Driving for Better Energy Efficiency in
the Driving and Operating section of your Owner Manual.

Extended-Range Mode

Once the electric charge is depleted, the range-extending gas
engine will start to generate enough power to continue driving the
vehicle. Engine operation ensures that you will not be stranded by
a depleted battery. The vehicle determines when the engine
Maximizing
Range
needs to run. Engine speed will vary, depending on driving
conditions, to optimize efficiency. The engine will not fully charge
the high voltage propulsion battery. The vehicle must be plugged
in to recharge.
Total Vehicle Range
Total vehicle range is based on the available combined electric
and extended range. The displayed electric and fuel ranges are
projections based on past vehicle performance and charge/fuel
level. The displayed ranges will change based on driving style,
outside temperature and climate settings.
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See Driving and Operating in your Owner Manual.