BMW X7 Owner's Manual page 346

DRIVING TIPS
Exterior mirrors
Exterior mirrors, which allow the driver to see
both rear edges of the trailer, are available as
special accessories from a dealer's service cen‐
ter or another qualified service center or repair
shop.
Electrical consumption
General information
Before starting to drive, check the function of the
trailer tail lights.
Keep the activation times of the electrical com‐
ponents short when towing a camper to save the
vehicle battery power.
Trailer tail lights
▷ Turn signals/brake lights: 54 watts per side.
▷ Rear lights: 100 watts in total.
▷ Backup light: 54 watts in total.
Towing a trailer
General information
If the trailer socket is occupied, some driver as‐
sistance systems are unavailable, or available to a
limited extent. A Check Control message is dis‐
played where applicable.
When driving with a trailer or load carrier and the
trailer socket not occupied, some driver assis‐
tance systems may have functional limitations or
may malfunction.
To prevent malfunctions, activate trailer towing.
When the trailer socket is occupied or trailer tow‐
ing is activated, some driver assistance systems
are unavailable, or available to a limited extent. A
Check Control message is displayed where ap‐
plicable.
Additional information:
Activating trailer towing, refer to page 347.
346
Trailer towing
Online Edition for Part no. 01405A385B6 - VI/21
Safety information
Warning
Depending on the design and loading of trail‐
ers, they may begin swinging at speeds ex‐
ceeding approx. 50 mph/80 km/h. There may
be a risk of accident or risk of damage to prop‐
erty.
Adapt your speed when driving with a trailer.
Immediately brake in the case of swinging. Ap‐
ply necessary steering corrections as carefully
as possible.
Warning
The tire inflation pressure must be adjusted to
the increased axle weight in trailer towing. Driv‐
ing with too low tire inflation pressure can dam‐
age the tires. There may be a risk of accident or
risk of damage to property. Do not exceed a
speed of 60 mph / 100 km/h. Increase the tire
inflation pressure of the towing vehicle by
0.2 bar. Note the maximum possible tire infla‐
tion pressure indicated on the tire.
Uphill grades
General information
In the interest of safety and to avoid hindering
the smooth flow of traffic, the towing of trailers is
permissible on uphill grades up to 12 %.
If higher trailer loads are approved at a later point
in time, the gradient limit is 8 %.
Starting on uphill grades
The parking brake is automatically released
when the accelerator pedal is activated.
In order to prevent rolling back during starting,
use the parking brake.
1. Pull and release switch before starting
off.