hill assist BMW 335I 2011 E90 Owner's Manual

Controls
87Reference
At a glance
Driving tips
Communications
Navigation
Entertainment
Mobility
Hill Descent Control HDC*
HDC is a downhill driving assistant that controls
your speed on steep downhill gradients and
makes it even easier to control your BMW's
handling under these conditions. The vehicle
then moves slightly faster than double walking
speed without the driver needing to intervene.
HDC can be activated as long as you are driving
under approx. 20 mph or 35 km/h. When driving
downhill at a speed of under approx. 20 mph or
35 km/h, the vehicle's speed is automatically
reduced to slightly more than double walking
speed and maintained.
Increasing or decreasing speed
By accelerating or braking you can change this
speed within a range from approx. 3 to 15 mph,
approx. 5 to 25 km/h.
You can specify a target speed within the same
range using the cruise control
* lever on the
steering column.
1To increase speed
2To decrease speed
Activating HDC
Press the button; the LED lights up.
When the vehicle is being braked automatically,
the LED flashes.
Deactivating HDC
Press the button again; the LED goes out.
HDC is automatically deactivated at speeds
greater than approx. 35 mph/60 km/h.
Using HDC
In cars with manual transmission:
Use HDC in lower gears and in reverse gear.
With automatic transmission:
You can use HDC in any drive position.
Displays in the instrument cluster*
1Display for target speed
2HDC display
Malfunction
The HDC display disappears during HDC oper-
ation, or does not appear:
HDC is temporarily unavailable due to exces-
sive brake temperature, or DSC has failed.
Drive-off assistant
The drive-off assistant enables you to drive off
smoothly on uphill gradients. It is not necessary
to use the parking brake for this.
1.Hold the car in place by depressing the
brake.
2.Release the brake and drive off without
delay.
The drive-off assistant holds the car in
place for approx. 2 seconds after the
brake is released. Drive off without delay after
releasing the brake. Otherwise, the drive-off
assistant will no longer hold the car in place
after approx. 2 seconds and the car will start to
roll backwards.<

Lamps
100
System limitations
The high-beam assistant cannot serve as
a substitute for the driver's personal judg-
ment of when to use the high beams. Therefore,
manually switch off the high beams in situations
where this is required to avoid a safety risk.<
The system is not fully functional in situations
such as the following, and driver intervention
may be necessary:
>In very unfavorable weather conditions,
such as fog or heavy precipitation
>In detecting poorly-lit road users, such as
pedestrians, cyclists, horseback riders and
wagons; when driving close to train or ship
traffic; and at animal crossings
>In tight curves, on hilltops or in depressions,
in cross traffic or half-obscured oncoming
traffic on highways
>In poorly lit towns and cities and in the pres-
ence of highly reflective signs
>At low speeds
>When the windshield in front of the interior
rearview mirror is fogged over, dirty or cov-
ered with stickers, etc.
>If the sensor is dirty. Clean the sensor on
the front of the interior rearview mirror using
a cloth moistened with a small amount of
glass cleaner.
Activating via iDrive
1."Settings"
2."Lighting"
3."High beam assistant"
The high-beam assistant is activated and is
stored for the remote control currently in use.
Fog lamps
The parking lamps or low beams must
be switched on for the fog lamps to
operate. The green indicator lamp in
the instrument cluster lights up whenever the
fog lamps are on.
The fog lamps are switched off while you acti-
vate the headlamp flasher or switch on the high
beams.
If the automatic headlamp control is acti-
vated, the low beams will come on auto-
matically when you switch on the fog lamps.<

Things to remember when driving
124
Diesel particulate filter*
The diesel particulate filter collects soot parti-
cles and burns them periodically at high tem-
peratures. This cleaning process takes several
minutes. During cleaning, you may notice that
the engine temporarily runs less smoothly and
that a somewhat higher engine speed is neces-
sary to achieve the accustomed performance.
Also, noises may be heard and a slight amount
of smoke may emerge from the exhaust, even
for a short period after the engine is switched
off.
Hydroplaning
When driving on wet or slushy roads,
reduce road speed. If you do not, a wedge
of water can form between tires and road sur-
face. This situation, known as hydroplaning,
means that the tire can completely lose contact
with the road surface, so that neither the car can
be steered nor the brake be properly applied.<
The risk of hydroplaning increases with declin-
ing tread depth on the tires, refer also to Mini-
mum tread depth on page222.
Driving through water
Drive through water on the road only if it is
not deeper than 1 ft/30 cm, and then only
at walking speed at the most. Otherwise, the
vehicle's engine, the electrical systems and the
transmission may be damaged.<
Use the parking brake on inclines
On inclines, do not hold the vehicle for a
lengthy period using the clutch; use the
parking brake instead. Otherwise, greater
clutch wear will result.<
For more information about the drive-off
assistant, refer to page87.
Braking safely
Your BMW is equipped with ABS as a standard
feature. Applying the brakes fully is the most
effective way of braking in situations in which
this is necessary. Since the vehicle maintains
steering responsiveness, you can still avoid
possible obstacles with a minimum of steering
effort.
Pulsation of the brake pedal, combined with
sounds from the hydraulic circuits, indicate that
ABS is in its active mode.
Driving in wet conditions
When roads are wet or there is heavy rain,
briefly exert gentle pressure on the brake pedal
every few miles. Monitor traffic conditions to
ensure that this maneuver does not endanger
other road users. The heat generated in this
process helps dry the pads and rotors to ensure
that full braking efficiency will then be available
when you need it.
Hills
To prevent overheating and the resulting
reduced efficiency of the brake system,
drive long or steep downhill gradients in the
gear in which the least braking is required. Even
light but consistent brake pressure can lead to
high temperatures, brake wear and possibly
even brake failure.<
You can increase the engine's braking effect by
shifting down, all the way to first gear if neces-
sary. This strategy helps you avoid placing
excessive loads on the brake system. Down-
shifting in manual mode of the automatic trans-
mission, refer to page59.
Never drive with the clutch held down,
with the transmission in neutral or with
the engine switched off; otherwise, engine
braking action will not be present or there will be
no power assistance to the brakes or steering.
Never allow floor mats, carpets or any other
objects to protrude into the area around the
pedals; otherwise, pedal function could be
impaired.<

Giving and receiving assistance
250
With a tow rope
When starting off in the towing vehicle, make
sure that the tow rope is taut.
To avoid jerking and the associated
stresses on vehicle components when
towing, always use nylon ropes or nylon straps.
Attach the tow rope to the tow fittings only, as
attaching it to other parts of the vehicle could
result in damage.<
With a tow truck: vehicle without xDrive
Have the BMW transported with a tow truck
with a so-called lift bar, or on a flatbed.
Do not tow the vehicle with just the rear axle
raised as this may cause the steering to turn.
With a tow truck: vehicle with xDrive
Do not tow a BMW with xDrive with just
the front or rear axle raised; otherwise, the
wheels could lock up and the transfer case
could be damaged.<
Have the BMW transported on a flatbed surface
only.
Tow-starting
Avoid tow-starting the vehicle whenever possi-
ble; instead, jump-start the engine, refer to
page247.
1.Switch on hazard warning flashers, comply
with local regulations.
2.Switch on the ignition, refer to page55.
3.Shift into 3rd gear.
4.Have the vehicle tow-started with the clutch
depressed and slowly release the clutch.
After the engine starts, immediately
depress the clutch completely again.
5.Stop at a suitable location, remove the tow
bar or rope and switch off the hazard warn-
ing flashers.
6.Have the vehicle checked.
With xDrive: do not activate Hill Descent
Control HDC when the vehicle is being
tow-started, page87.<

Everything from A to Z
270 Displacement, refer to Engine
data254
Display, refer to iDrive
controls16
Display lighting, refer to
Instrument lighting101
Displays
– on the Control Display16
Displays, refer to Instrument
cluster12
Displays and controls10
Disposal
– coolant230
– remote control battery36
– vehicle battery244
Distance remaining to service,
refer to Service
requirements76
Distance warning, refer to
Park Distance Control
PDC84
Door key, refer to Remote
control with integrated
key26
Door lock29
Doors, emergency
operation30
DOT Quality Grades221
Draft-free ventilation105
Drinks holders, refer to
Cupholders112
Drive-off assistance, refer to
Dynamic Stability Control
DSC85
Drive-off assistant87
Driving lamps, refer to Parking
lamps/low beams97
Driving notes122
Driving off on hills, refer to
Drive-off assistant87
Driving stability control
systems85
Driving through water124
Driving tips, refer to Driving
notes122
Dry air, refer to Cooling
function104
DSC Dynamic Stability
Control85DTC Dynamic Traction
Control86
– indicator/warning lamp86
DVD
– country codes163
– settings164
– video playback163
DVD menu164
DVD player, refer to CD
player161
DVD video163
Dynamic Brake Control
DBC85
Dynamic destination
guidance141
Dynamic Stability Control
DSC85
– indicator/warning lamp86
Dynamic Traction Control
DTC
– indicator/warning lamp86
E
EBV Electronic brake-force
distribution85
Eject button, refer to Buttons
on the CD/DVD player150
Electrical malfunction
– door lock30
– driver's door30
– fuel filler flap202
– glass roof38
– panorama glass roof40
– trunk lid32
Electric seat adjustment43
Electric steering wheel lock
– with Comfort Access35
Electronic brake-force
distribution EBV85
Electronic oil level check227
Electronic Stability Program
ESP, refer to Dynamic
Stability Control DSC85
Emergency actuation,
automatic transmission,
refer to Overriding selector
lever lock60Emergency operation
– fuel filler flap, manual
release202
Emergency operation, refer to
Closing manually
– glass roof38
– panorama glass roof40
Emergency operation, refer to
Manual operation
– door lock30
Emergency release
– trunk lid from inside32
Emergency Request246
Emergency services, refer to
Roadside Assistance246
Energy, saving
– saving fuel122
Energy-conscious driving,
refer to Energy Control72
Energy Control72
Engine
– breaking in122
– data254
– overheated, refer to Coolant
temperature72
– speed254
– starting56
– starting, Comfort Access34
– switching off56
Engine compartment226
Engine coolant, refer to
Coolant230
Engine oil
– adding229
– alternative oil types229
– BMW Maintenance
System231
– capacity258
– checking level227
– dipstick
227
– intervals between changes,
refer to Service
requirements76
Engine output, refer to Engine
data254
Engine speed, refer to Engine
data254
Engine starting, refer to
Starting the engine56

Everything from A to Z
272 Glass roof, electric37
– closing after electrical
malfunction38
– convenient operation28,29
– initializing38
– opening, closing38
– pinch protection system38
– power failure38
– raising37
– remote control28
Glove compartment110
GPS navigation, refer to
Navigation system130
Grills102
Gross vehicle weight, refer to
Weights257
H
Halogen lamps
– replacing bulbs239
Handbrake, refer to Parking
brake57
Hands-free system14
Hazard warning flashers14
HDC Hill Descent Control87
HD Radio154
Head airbags94
Headlamp control,
automatic97
Headlamp cover239
Headlamp flasher60
– indicator lamp11,13
Headlamps
– replacing bulbs239
Head restraints44
– rear, removing45
– sitting safely42
Heated
– mirrors48
– rear window104
– seats46
– steering wheel50
Heating
– mirrors48
– rear window104
– seats46
– steering wheel50Heating and ventilation, refer
to Climate102
Heavy loads, refer to Stowing
cargo126
Height, refer to
Dimensions255
Height adjustment
– seats43
– steering wheel50
High-beam assistant99
High beams99
– headlamp flasher99
– indicator lamp13
– replacing bulbs239
High beams and low beams,
automatic, refer to High-
beam assistant99
High-pressure
washer233,234
High water, refer to Driving
through water124
Highways, refer to Route
criteria140
Hill Descent Control HDC87
Hills124
Holders for cups112
Homepage BMW4
Hood225
Hooks for shopping
bags116,117
Horn10,11
Hotel function, refer to
Locking or unlocking
separately32
Hot exhaust system123
Hydraulic brake assist, refer to
Dynamic Brake Control85
Hydroplaning124
I
IBOC, refer to HD Radio154
Ice warning, refer to Outside
temperature warning71
Identification marks
– run-flat tires223
– tire coding221iDrive16
– adjusting brightness83
– changing date and time79
– changing language83
– changing settings83
– changing units of measure
and display format76
– controls16
– menu guidance17
– operating principle16
– overview16
– start menu17
– status information19
iDrive operating principle16
Ignition55
– switched off56
– switched on55
Ignition key, refer to Remote
control with integrated
key26
Ignition key position 1, refer to
Radio readiness55
Ignition key position 2, refer to
Ignition on55
Ignition lock55
Imprint2
Indicator and warning
lamps13
– Tire Pressure Monitor
TPM91
Inflation pressure, refer to Tire
inflation pressure208
Inflation pressure monitoring,
refer to Tire Pressure
Monitor TPM89
Initializing
– after power failure245
– compass, refer to
Calibrating110
– Flat Tire Monitor FTM88
– glass roof38
– panorama glass roof40
– radio, refer to Station,
storing154
– refer to Setting the time and
date79
Installation location
– telephone111