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      05-06-2017, 05:13 PM   #3
edpm3
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Drives: 2015 i8, 2021 X5 M50i, 1995 M3
Join Date: Jul 2015
Location: Kansas City, MO

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Quote:
Originally Posted by JasH View Post
Just a related question. When you plug in to charge the main batteries, does the 12V get topped up too?

Anyone know please?
This section of the Owner's Manual leads me to believe it does:

Discharged high-voltage and vehicle battery

General information

In addition to the high-voltage battery, the vehicle has a 12 volt vehicle battery, which is required for operation of the onboard electronics.

With a discharged vehicle battery, no operation of the vehicle is possible.

Place vehicle in service

To place the vehicle in service, charge as usual.

If there is no possibility of charging on site, contact the service center.

Charging vehicle with a discharged vehicle battery

1. Unlock the vehicle, if needed, using the integrated key, refer to page 38.
2. Secure the vehicle against rolling.
3. Connect either a Level 1 or Level 2 charging cable to the household socket or the port on the charging station.
4. Attach charging cable corresponding to the charging socket connection.

Charging is started. The charging status is not displayed. Do not open vehicle during this time.

After several minutes, the vehicle is slightly charged. The onboard electronics are ready again. It is again possible to open the vehicle.

The charging status as well as the charging state of the high-voltage battery can be displayed again.

If the vehicle battery cannot be charged, contact the service center.
Appreciate 1
JasH621.00