Automatic electrical load deactivation
If the vehicle battery drain is high, the intelligent onboard electrical
system management automatically takes steps to help prevent bat-
tery drain.
The idle speed is increased so that the alternator provides more
power.
The power to devices that consume a lot of electricity is cut back or
switched off completely.
When the engine is started, the power supply to the 12 Volt sockets
is temporarily interrupted.
The onboard electrical system management cannot always keep the
battery from being drained. For example, the battery will drain if the
engine is not running, but the ignition is switched on or the parking
lights are left on for a long time when parked.
Battery disconnection in an accident with airbag deployment
In vehicles with a battery in the luggage compartment, the electrical
connection to the battery is disconnected automatically in a collision
with airbag deployment. This helps to prevent a short-circuit.
What drains the vehicle battery?
Long periods when the engine is not running, especially when the
ignition is on.
Using electrical systems or devices when the engine is switched
off.
Leaving the vehicle unlocked for several days when not in use.
The selector lever is left for a long period of time in any position
other than P when the ignition is switched off ⇒ Automatic transmis-
sion: Selector lever.
WARNING
Failure to use the proper battery with proper mounting and
connections may cause short circuits, fires, and serious per-
sonal injuries.
Always use only maintenance-free or cycle-free, leak-proof
batteries with the same specifications and dimensions as the
original equipment battery. Specifications are listed on the bat-
tery housing.
NOTICE
To help prevent vehicle damage in a car wash:
Compare the vehicle track width with the dimensions of the
guide rails in the car wash to help prevent damage to wheel rims
and tires!
Switch off the rain sensor before driving the vehicle through a
car wash ⇒ Rain sensor.
Make sure there is enough clearance for the height and width
of the vehicle.
To help prevent paint damage to the engine hood, place wiper
blades against the windshield after they have dried. Do not let
them snap back into place.
Fold the outside mirrors toward the vehicle body. Do not fold
power folding mirrors manually!
Lock the luggage compartment lid to help prevent uninten-
tional opening in the car wash.
Washing with a power washer
