B-Class Electric Drive: Charging — Mercedes-Benz

Hi, I’m Jim, for Mercedes-Benz. I’m going
to show you how to recharge the battery in your B-Class Electric Drive. The B-Class is powered by an advanced high-voltage
battery pack. As you drive, the battery charge is consumed… much the way a conventional
car uses gasoline. Recharging a battery is different from refilling
a gas tank, of course. But there are also differences in your driving range… and how
the battery responds when its charge runs very low.
With a full charge, your B-Class has an approximate driving range of 85 miles. Many conditions
can affect that range… hills, temperature, and your use of climate control and other
features. Your driving style matters, too. Be sure to
watch the separate video on Driving your B-Class. You can charge the vehicle at home… at a
public charging station… and almost anywhere there’s an electrical outlet.
Different types of chargers use different voltage… either 120 volts, like an ordinary
household outlet… or 240 volts, which charges the battery much faster… usually about three
and a half hours for a full charge… though you can get about 60 miles of range in less
than two hours. You’ll find 240 volt charging at most public
charging stations… and you might have had a 240 charging station professionally installed
in your home. Your utility company can tell you more about those… and they might offer
some incentives. Before charging, the car should be in Park,
with the parking brake set, and the vehicle switched off. You plug the charging cable in here, under
a flap that’s like a fuel filler. Push on the flap to open it. The socket in the car is called a “J-1772”
plug, and it’s a universal standard used by most charging stations today. Push the
locking tab to the right, and the socket cover opens.
Insert the cable into the socket until it snaps into place. A message in the instrument
cluster will note that the cable is connected. Most chargers perform a self-test at startup.
And public stations might need to exchange some technical information with the car…
as well as activation by a credit card or other device… so charging might not begin
for a few moments. While the car is charging, you might hear
sounds from the car. It’s normal for the car to activate its own cooling fans and other
systems at times. Don’t start or move the vehicle while it’s
charging. When the charge level display in the car… and often on the charger, too…
shows 100%, the battery is fully charged. Your B-Class comes with a charging cable that’s
specifically engineered for the car. It’s stored in a case in the cargo area. You can plug it directly into a standard 3-prong
household outlet that delivers 120 volts. We don’t recommend using an extension cord
or any non-approved adapter. When you plug it in, you’ll see a few LED
displays. The top row is actually two readouts. A green light on the left indicates it’s
receiving A-C current. A green light on the right confirms the built-in circuit protection
is active. It might take a moment for these to appear… after a self-test. If either lights up solid red, unplug the
cable from the wall and see your Operator’s Manual.
The lower indicator shows the rate of charging, low or high. You switch between the two by
pressing the round button. Use the low setting if your 120 volt outlet
cannot handle the higher setting, and trips its fuse or circuit breaker. You should always
check the maximum permissible current for the outlet… or ask a qualified expert…
and adjust the charge setting as needed. Drawing too much current can overheat the circuit
and create the risk of fire. You can also vary the charge rate from inside
the car. Using the multifunction steering wheel, select the Settings menu… then E-Cell…
Maximum Charge and make a selection. The charger will always use the lower value between the
car setting and the cable setting. A full charge can take up to 30 hours or more
using one-twenty voltage. There might be rare occasions where a few
extra miles of range are necessary… like if the availability of charging stations at
your destination is very limited. If you press the optional “Range Plus”
button, the next charge cycle will be extended, along with the driving range. Please be aware that the more you use this
feature, the more you shorten the life and overall range of the battery. It’s only
for occasional use. When you’re done charging, press the button
on the cable and remove the plug from the car. If you’re using your 120 cable, unplug it
from the wall and keep it with the car, in its case. If you’re using a 240 charger,
return the cable to its receptacle. Snap the socket cover closed, then close the
flap. If you try to drive away with the car plugged
in, a warning may appear in the dash. Of course, you don’t want to do this. You can damage
the car and the charger. You can see the state of charge on the smaller
gauge inside the speedometer. It works much like a fuel gauge. A digital readout above the speedometer shows
you the driving range available at the present state of charge. Again, driving style and
other conditions can vary your actual range. If the charge drops below 13%, the reserve
indicator lights up in the charge gauge. Charge the battery as soon as possible. Below 5%, vehicle performance will be reduced
in an effort to preserve remaining range and protect the vehicle. If you approach zero percent, you’ll see
a warning to pull safely off the road immediately, since the car is about to turn off.
Please read your Operator’s Manual… for more information about charging and storing
your electric vehicle. If you have further questions, your Mercedes-Benz
dealer will be happy to help. Thanks for watching.

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