2009 BMW Z4 SDRIVE35I Owners Manual

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4.Attach one terminal clamp of the minus/–
jumper cable to the nega tive terminal of the
battery or to an engine or body ground of
the assisting vehicle.
Your BMW has a special nut as body ground
or negative pole.
5. Attach the second te rminal clamp of the
minus/– jumper cable to the negative termi-
nal of the battery or to the engine or body
ground of the vehicle to be started.
Starting the engine
1. Start the engine of the donor vehicle and
allow it to run for a few minutes at slightly
increased idle speed.
2. Start the engine on the other vehicle in the
usual way.
If the first start attempt is not successful,
wait a few minutes be fore another attempt
in order to allow the discharged battery to
recharge.
3. Let the engines run for a few minutes.
4. Disconnect the jumper cables by reversing
the above connecting sequence.
If necessary, have the battery checked and
recharged.
Never use spray fluids to start the
engine. <
Tow-starting, towing away
Observe the applicable laws and regula-
tions for tow-starting and towing
vehicles. <
Do not transport any passengers other
than the driver in a vehicle that is being
towed. <
Using a tow fitting
The screw-in tow fitting must always be carried
in the car. It can be sc rewed in at the front or
rear of the BMW.
It is stored in the onboard tool kit underneath
the floor panel in the cargo bay, refer to
page 208.
Use only the towing eyelet supplied with
the vehicle and screw it in firmly until it
stops. Use the tow fitting for towing on paved
roads only. Avoid lateral loading of the tow fit-
ting, e.g. do not lift the vehicle by the tow fitting.
Otherwise the tow fitting and the vehicle could
be damaged. <
Access to screw thread
Front
Release the cover panel in the bumper:
Press on the recess at the bottom left in the
cover panel.
Rear
Release the cover panel in the bumper:
Press on the recess at the bottom center in the
cover panel.

Giving and receiving assistance
216
Being towed
Make sure that the ignition is switched on,
refer to page50, otherwise the low-beam
headlamps, tail lamps, turn signal indicators and
windshield wipers may be unavailable.
If the electrical system fails, do not tow-start or
tow the vehicle. The electrical steering wheel
lock cannot be released and the vehicle cannot
be steered. Jump-starting, refer to page 214.
Power steering assistance is not available when
the engine is not running. Thus, braking and
steering will requir e increased effort.<
Manual transmission
Gearshift lever in neutral position.
Automatic transmission
Selector lever in position N.
Changing selector leve r positions, refer to
page 54.
Do not exceed a towing speed of 31 mph
or 50 km/h and a towing distance of
31 miles/50 km, otherwise the automatic trans-
mission may be damaged. <
7-gear sport automatic transmission
with dual clutch
Ensure that transmission lock P is not
engaged as the rear wheels will otherwise
be blocked.
When using the car wash function, refer to
page 205, note that the parking lock P is
engaged automatically after approx. 30 min-
utes, blocking the rear wheels.
If an electrical malfunction occurs or if towing
takes longer than approx. 20 minutes, manually
release the parking lock, refer to page 58.<
Do not exceed a towing speed of 31 mph
or 50 km/h and a towing distance of
31 miles/50 km, otherwise the 7-gear sport
automatic transmission may be damaged. <
Towing methods
Do not lift the vehicle by a tow fitting or
body and chassis parts, otherwise dam-
age may result. <
With a tow bar
The towing vehicle must not be lighter
than the towed vehicle, otherwise it may
be impossible to maintain control. <
The tow fittings used should be on the same
side on both vehicles. Should it prove impossi-
ble to avoid mounting the tow bar at an angle,
please observe the following:
> Clearance and maneuvering capability will
be sharply limited during cornering.
> The tow bar will generate la teral forces if it is
attached offset.
Attach the tow bar to the tow fittings only,
as attaching it to othe r parts of the vehicle
could result in damage. <
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 pa rts of the vehicle could
result in damage. <
With a tow truck
Manual and automatic transmission:

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7-gear sport automatic transmission with dual
clutch:
Have the BMW transported with a tow truck
with a so-called lift bar or on a flat bed.
Tow-starting
Avoid tow-starting the vehicle whenever possi-
ble; instead, jump-start the engine, refer to
page214. Vehicles with a catalytic converter
should only be tow-st arted when the engine
is cold.
Vehicles with an automatic transmission or 7-
gear sport automatic transmission with dual
clutch cannot be tow-started at all.
1. Switch on hazard warning flashers, comply
with local regulations.
2. Switch on the ignition, refer to page 50.
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 vehi cle checked.

Reference
This chapter contains technical data, short
commands for the voice activation system and
an index that will help you find information most
quickly.
Reference

Technical data
220
Technical data
Engine data
Z4 sDrive30iZ4 sDrive35i
Displacement cu in/cmμ 182.8/2,996 181.8/2,979
Number of cylinders 66
Maximum power output hp255300
at engine speed rpm6,6005,800
Maximum torque lb ft/Nm 220/298300/407
at engine speed rpm2,6001,400 - 5,000

Reference 221
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Mobility
Dimensions
All dimensions given in inches/mm.
Smallest turning circle diam.: 36 ft 1 in/11.0 m.

Technical data
222
Weights
Capacities
Z4 sDrive30iZ4 sDrive35i
Approved gross weight
> with manual transmission lbs/kg 3,924/1,7804,134/1,875
> with automatic transmission lbs/kg 3,990/1,8104,178/1,895
Load lbs/kg562/255 562/255
Approved front axle load lbs/kg 1,808/8201,918/870
Approved rear axle load lbs/kg 2,227/1,0102,271/1,030
Cargo bay capacity cu ft/l 6.4 - 10.9/180 - 310 6.4 - 10.9/180 - 310
Notes
Fuel tank US gal/liters approx. 15.5/55 Fuel grade:
page 189
including reserve of US gal/liters approx. 2.1/8.0
Window washer system For more details:
page61
including headlamp washers US qt/liters approx. 6.3/6.0