2008 AUDI A4 AVANT relay

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Trailer lights
Trailer lights must meet all regulations. Be sure to check with your
authorized Audi dealer for correct wiring, switches and relays .
Mirrors
If you are unable to see the traffic behind you using the regular
outside mirrors, then you
must install extended mirrors. It is impor ­
tant that you
always have clear vision to the rear .
& WARNING
After removing the trailer hitch, do not store it in your vehicle. In
case of sudden braking, the hitch could fly forward and injure you
or your passengers. •
Operating instructions
Maximum trailer weight
A trailer for your vehicle is limited to a typical class 1 or class 2
trailer .
Trailer load distribution
Be sure the load in the trailer is held securely in place to guard
against shifting, be it forward, backward or sideways.
Never allow a passenger to ride in a trailer~ & in "Driving instruc­
tions".
Tire pressure
When towing a trailer, inflate the tires of your vehicle to the cold tire
pressure listed under "Full load" on the sticker on the right door­
jamb. Inflate trailer tires to trailer and tire manufacturers' specifica­
tions .
Controls and equip­
ment Safety first Vehicle operation Lights
The
headlight settings should be checked with the trailer attached
before driving off. Adjust as necessary so that you can see the road
ahead but not blind oncoming traffic.
Check proper working of vehicle and trailer lights .
Power Supply
The power supply to the trailer is disconnected when the ignition
key is removed.
Safety chains
Be sure trailer safety chains are properly connected from the trailer
to the hitch on the vehicle . Leave enough slack in the chains to
permit turning corners. When you install safety chains, make sure
they will not drag on the road when you are driving.
The chains should cross under the trailer tongue to prevent it from
dropping in case of separation from the hitch.•
Driving instructions
Driving with a trailer always requires extra care and
consideration.
To obtain the best possible handling of vehicle and trailer,
please note the following:
- Do not tow a loaded trailer when your car itself is not
loaded.
- Be especially careful when passing other vehicles.
- Observe speed limits.
- Do not drive at the maximum permissible speed.
- Always apply brakes early.
- Monitor the temperature gauge.
Vehicle care Do-it-yourself service Technical data

___ C_ h_ e_c _k_ i_n ~g _ a_n_ d_ f_ il _li_ n~ g~--------------------------------------------
For example, a charging current of 4.5 amps would be used on a
battery rated at 45 Ah. Rated capacity of the battery in your vehicle
is listed on the battery housing .
The battery caps should
not be opened when charging a battery.
& WARNING
Charging a battery can be dangerous.
• Always follow the operating instructions provided by the
battery charger manufacturer when charging your battery.
• Never charge a frozen battery . It may explode because of gas
trapped in the ice. Allow a frozen battery to thaw out first.
• Do not reuse batteries which were frozen. The battery housing
may have cracked and weakened when the battery froze.
• Charge the battery in a well ventilated area. Keep away from
open flame or electrical spark. Do not smoke. Hydrogen gas gener ­
ated by the battery is explosive.
• To reduce the danger of explosion, never connect or disconnect
charger cables while the charger is operating.
• Fast charging a battery is dangerous and should only be
attempted by a competent technician with the proper equipment.
• Battery acid that may spill during charging should be washed
off with a solution of warm water and baking soda to neutralize
the acid.
0 Note
Never use a fast charger as a booster to start the engine . This will
seriously damage sensitive electronic components, such as control
units, relays, radio, etc ., as well as the battery charger. •
Disconnecting and connecting the battery
When the battery is disconnected some features on the
vehicle will become inoperative and you must reset them
when the battery is reconnected.
When you disconnect the vehicle battery note the following:
• some data stored in the driver information system is erased,
• the clock stops,
• the factory installed radio locks up,
• the engine management system and the one-touch-up and one­
touch -down functions of the power windows no longer work .
After you reconnect the battery, you must reset the following
features :
Inoperative because the
battery was discon­
nected:
clock
one-touch-up and one-touch­
down feature on the power
windows
engine management
seat memory*
radio station coding
Removing battery
To reset after the battery is
reconnected, see:
=> page 14
=> page 67
=> page 135
=> page 100
Sound System Operating Instruc -
tions booklet .
•
Before you check anything in the engine compartment,
always
read and heed all WARNINGS :::> & in "Working in
the engine compartment" on page
273. ~

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/b, WARNING (continued)
• Before you check anything in the engine compartment, always
read and heed all
WARNINGS~ page 265, "Engine compartment".
0 Note
• Applying a higher voltage booster battery will cause expensive
damage to sensitive electronic components, such as control units,
relays, radio, etc .
• There must be no electrical contact between the vehicles as
otherwise current could already start to flow as soon as the positive
( + ) terminals are connected.
[ i] Tips
• The discharged battery must be properly connected to the
vehicle's electrical system. •
Use of jumper cables
Make sure to connect the jumper cable clamps in exactly
the order described below!
Vehicle with discharged battery:
Fig. 234 Jump­
starting with the
battery of another
vehicle: A -discharged
vehicle battery, B -
booster battery
- Turn off lights and accessories, move lever of automatic
transmission to
N (Neutral) or P (Park) and set parking
brake.
Connect POSITIVE (+) to POSITIVE (+) (red)
1. Connect clamp of plus cable to positive( +) terminal (D
:::> fig. 234 of discharged vehicle battery @.
2. Connect clamp on opposite end of cable to positive(+)
terminal
@ of booster battery ®·
Connect NEGATIVE (-) to NEGATIVE (-) (black)
3. Connect clamp of minus cable (black) to negative (-)
terminal
0 of booster battery®·
Do-it-yourse lf service irechnical data