Ferrari 458 Italia Owner's Manual page 201

After connecting the battery conditioner to the socket in the
vehicle, run the connection cable under the passenger door on the
front side.
Important note
Do not run the connection cable out of the vehicle in positions
other than those indicated to prevent damaging the seals and/or
the cable.
If you do not plan to use the vehicle for over a week, we
recommend you connect the battery conditioner to keep the battery
in perfect working order.
Warning
The engine cannot be started as long as the battery conditioner
is connected to the vehicle socket.
Important note
Additional technical information on the use of the device can be
found in the manual provided inside the pocket of the car cover
bag.
Exhaust system overheating alarm devices ("Slow Down"
function)
If the engine is running unevenly resulting in exhaust system
overheating, the "Slow Down" function is activated: a special
symbol (see page 116) appears on the left TFT display
accompanied by a message.
The message varies according to three alarm levels:
• Temperature high: "Catalysts temp. high. Slow down".
• Temperature too high: "Catalysts temp. too high. Engine
performance limited".
• Catalytic converter temperature system failure: "Catalysts temp.
not plausible. Go to dealer slowly".
Displaying of the message is controlled by the thermistor via the
engine control ECU.
Warning
Incorrect use of the vehicle may cause the "Slow Down"
function to be activated.
Advice for Emergency Situations
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201