Audi A4, S4

since 2000 of release

Repair and car operation

Trailer towage

The factory complete set of the car the traction coupling device provides also all necessary for trailer operation according to technical and standard requirements.

For electric connection of the car and the trailer the car is completed with the 13-contact plug socket. At existence on the trailer of a 7-contact plug fork it is possible to use the corresponding cable available at the Audi enterprises the adapter.

Additional installation of the traction coupling device should correspond to requirements of the manufacturer of this device.

Maintenance instructions

Remember admissible maximum mass of towed cargo, see. Specifications.

Mass of towed cargo

At all do not exceed admissible maximum mass of towed cargo.

If the most admissible mass of the trailer is not used completely, it is possible to overcome liftings with bigger size of a bias.

Standard values of weight of towed cargo are valid only at height to 1000 m above sea level. With increase in height the razrezhennost of air raises both respectively engine capacity and, as a result, ability to overcoming of liftings decreases. Therefore the standard mass of a road train decreases for 10 % for each 1000 m of lifting. The mass of a road train is equal to the sum of mass (loaded) car and (loaded) trailer.

Data on the basic loading, specified in the factory plate of the trailer, are its control sizes. Given which can be lower than these sizes, it is possible to find in registration documents of the car or in Specifications.

Cargo placement

Cargo of the trailer distribute so that the heaviest subjects settled down whenever possible closer to its bridge. Besides, fix cargo not to allow its shift at movement.

The permissible basic load transferred to a spherical head through дышло of the trailer, use whenever possible completely, but do not exceed.

Pressure in tires

Establish pressure in the car tires, corresponding to its full load, see the plate of pressure of air in tires on a door rack. If necessary modify also pressure of air of tires of the trailer according to recommendations of his manufacturer.

External mirrors

If serial rear-view mirrors do not provide the sufficient back review, it is necessary to establish additional external mirrors. Both external mirrors should fasten on put arms. So adjust the provision of mirrors that the sufficient back review was provided.

Headlights

Prior to the beginning of movement with the trailer check and if necessary modify installation of headlights by means of the device of regulation of a tilt angle of headlights, see. Lighting and providing review.

Demountable spherical head

The demountable spherical head of the traction coupling device of a factory complete set is together with an erection manual in a niche of a spare wheel of a luggage carrier.

To the instruction but driving

Movement with the trailer demands extra care.

Do not tow the loaded trailer not loaded car. Do not move with the maximum speed, especially at movement under a bias. In due time brake. At high external temperature watch indication of temperature of cooling liquid.

Loading distribution

At the empty car and the loaded trailer loading distribution is extremely adverse. In need of movement in this option movement should be especially slow.

Speed

With increase in speed dynamic properties of a road train worsen. Therefore under adverse road, weather and aerodynamic conditions do not use the maximum speed resolved by traffic regulations. It especially concerns movement under a bias.

At once reduce speed at the slightest signs of wagging of the trailer. Do not try to "level" at all a road train increase in speed.

Brake in due time! At trailer towage with inertial brake system brake in the beginning softly, and then smoothly. It will help to avoid pushes the blocked wheels of the trailer. For use of possibility of braking by the engine, be in due time switched to a low gear.

Stabilizing adaptations reduce fluctuations of the trailer of rather cross-section axis and its wagging. It is recommended to apply them at considerable mass of the trailer.

Overheat

Watch indication of temperature of cooling liquid at very high external temperature and movement on long lifting on a low gear and with high frequency of rotation of a shaft of the engine, see. Governing bodies and devices. When calling arrow on the right part of a scale at once reduce speed. At a blinking in a control panel of an alarm lamp stop and cool the engine, let's to it work as some minutes idling.

Demountable traction coupling device

Introduction

Installation and dismantle of the traction coupling device demands accuracy.

The demountable spherical head of the traction coupling device is under a luggage carrier flooring.

Cars with a spare wheel.

Cars with the first-aid kit for repair of tires.

For installation and dismantle of a spherical head enough normal muscular efforts of hands.

Use of hinged components/autoaccessories on the traction coupling device

Remember that when using the improper hinged components mounted on the traction coupling device (for example, an arm for a bicycle), probably hidden damage of a spherical head that in an extreme case can lead to traction coupling device destruction during trailer towage.

Before each trip check correctness of fixing of a spherical head.

Never deblock a spherical head at the attached trailer.

At movement without the trailer remove a spherical head and check correctness of closing by a cover of a fixing nest.

When cleaning car by the steam-ejecting pump remove previously a spherical head and check correctness of closing of a fixing nest a cover.

Installation of a spherical head (the first stage)

Continuation, see. «Installation of a spherical head (the second stage)».

Installation of a spherical head (the second stage)

The spherical head should be pure and without damages

The spherical head should be mounted with a preliminary tightness

The preliminary tightness is provided with performance of the following conditions:

The red label of a flywheel is in a zone of a black label of the case of a spherical head. The clamp (B) is drowned in an opening of the case of a spherical head. The handle that is well visible visually, is at a certain distance from the case of a spherical head so between the handle and the case of a spherical head there is a gap (C).

It is possible to establish a spherical head only with a preliminary tightness.

Continuation, see. «Installation of a spherical head (the third stage)»

Installation of a spherical head (the third stage)

Tightness of a spherical head (if necessary)

Installation of a spherical head

PERFORMANCE ORDER

Establish a spherical head with a tightness in a fixing nest and wring out up in the direction specified by an arrow. Process of fixing is carried out automatically. Thus click should be distinctly audible. Lock a spherical head key turn in the direction of a green label. Take a key.

Continuation, see. «Installation of a spherical head (the fourth stage)».

Head installation (the fourth stage)

Control of reliability of fastening

Correctness of fastening is provided with performance of the following conditions:

The green label (And) a flywheel is in a zone of a black label of the case of a spherical head. The handle adjoins to the case of a spherical head. As a result between the handle and the case of a spherical head - the arrow - is absent a gap. The spherical head is locked and the key is taken (the handle is not extended). The spherical head reliably sits in a fixing nest (check, feats her hand).

Trailer socket

PERFORMANCE ORDER

For connection of a cable of the trailer to the car take away down in the arrow direction the plug receptacle of the car located under a bumper.

At default of above-mentioned conditions repeat installation.

Dismantle of a spherical head

PERFORMANCE ORDER

Insert into the lock (1) flywheel a key. Unlock a spherical head (turn a key to a red label). Strong hold the case of a spherical head and pull the handle in the direction specified by an arrow (And). Turn the handle in the extended situation against the stop in the direction arrows (B). Release the handle. It is fixed independently with a tightness. Take a spherical head from a fixing nest (1) down. Thus the fixing nest is automatically closed by a cover 0. Spherical head lay under a luggage carrier flooring. Take away up the socket.

Points of fastening of the traction coupling device

	Fastening points: side view
	Fastening points: top view

Four points of fastening (A) of the traction coupling device are from the bottom party of the car.

The minimum distance (B) between a bumper and a spherical head should make 65 mm. The distance (C) between the back bridge and a spherical head should make 1056 mm.