Volkswagen EOS 2006 Manual

Service Training
Self-study Programme 355
The EOS 2006

2
The self-study programme shows the design and
function of new developments.
The contents will not be updated.
For current testing, adjustment and repair
instructions,
refer to the relevant service literature.
The Volkswagen Eos combines the characteristic flair
of a cabriolet with the emotional design of a coupé.
It is thus aimed at two different groups of buyers and
builds on the tradition of cabriolet production at
Volkswagen.
This very successful tradition started in 1949 with the
first Beetle Cabriolet and continued in 1979 with the
Golf Cabriolet and in 2003 with the New Beetle
Cabriolet.
Unlike its predecessors, the Eos is not derived from
another model, it is an independent development that
unites the characteristics of different vehicle types and
heads in a totally new direction in terms of roof
technology.
Together with the values of quality, comfort, safety
and engines, the Eos has a rounded, promising
vehicle concept that sets new standards among its
rivals.
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NEW Important
Note
Make sure you read self-study programme SSP 379 “EOS 2006 – Electrical System”.
You will need to read both programmes to gain an insight into the complex roof system and its operation.

3
In Brief . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Body. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Occupant Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Engines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Heating and Air Conditioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Electrical System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Convenience Electrics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Radio and Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Contents

4
In Brief
The Eos is named after the Greek goddess of the dawn, who was the daughter of the Titans Hyperion and Theia.
According to legend, the Titans, the oldest race of Greek deities, are the children of the first gods Gaia and Uranus,
who originate from chaos.
Eos is the sister of the sun god Helios and the moon goddess Selene.
Eos rises out of the Oceanus every morning and travels ahead of Helios in his chariot as he rides across the sky to
herald the new day.
Homer praises her beauty and her grace and describes her as a wonderful, beautiful and curly-haired goddess.
The Eos from Volkswagen combines the everyday and all-year round suitability of a coupé with the classic open-
top driving characteristics of cabriolets without their disadvantages like, for example, high noise level.
The Eos is built at the Auto Europa plant in Palmela, Portugal.
The Volkswagen Eos Cabriolet-Coupé
Eos — The Coupé
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Being an independently developed cabriolet-coupé, the Eos has the following characteristics:
- Sporty design and handling
- Electrohydraulically operated, five-piece folding steel roof with integrated glass sliding sunroof
-Fourfull-sizedseats
- High-level of interior comfort thanks to 12-way electrically adjusted seat with electrical easy-entry function
- Rear seat system with through-load option
- Generous boot volume when roof closed
- Extensive safety concept
with driver, front passenger and head airbags and active rollover protection system
- High torsional stiffness
- Low level of wind noise
- High-end sound system from Dynaudio
- ParkPilot with boot lid assist and
- a wide range of engines.
Eos — The Cabriolet
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6
In Brief
Exterior dimensions
Length 4407mm
Width 1791mm
High
with roof closed
1443mm
Wheelbase 2578mm
Track width at front 1545mm
Track width at rear 1553mm
Technical data
Exterior dimensions and weights
Weights
* when equipped with 3.2l 185kW V6 engine
Maximum weight 2090kg*
Curb weight 1713kg*
Cd value as coupé 0.315
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4407
2578
1791
1545 1553
1443

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Other dimensions and data
* when equipped with 3.2l 185kW V6 engine
Coupé boot volume 380l / 358l*
Cabriolet boot
volume
205l / 183l*
Tank c apacity 55 l
Interior dimensions
Interior length 1684mm
Front shoulder width 1390mm
Front headroom 952mm
Rear shoulder width 1055mm
Rear headroom 909mm
Interior dimensions
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Body
A body with a high static and dynamic rigidity is the
requirement for good vibration behaviour and
excellent driving properties.
This is achieved by using high, higher and highest-
strength sheet qualities as well as THERMOFORMED
SHEETS in conjunction with modern joining methods
like laser welding and structural adhesive joints. The
use of thermoformed sheets, in particular, has
increased the stability of the body without making it
heavier.
The following components are made from highest-
strength sheets:
- Inner A-pillar
-Seatconsoles
- Sills
- Rear longitudinal members
Highest-strength tubes are fitted in the upper area of
the doors and under the rear seat bench.
Thermoformed sheets are used:
- in the front bumper cross-members
- in the A-pillar reinforcements and in the
front windscreen frame
- in the door reinforcements
Body structure
Legend
Normal sheets
with a strength up to 140N/mm2
Strong sheets
with a strength from 180 to 240N/mm2
High-strength
sheets with a strength from 260 to 300N/mm2
Highest-strength
sheets with a strength from 300 to 420N/mm2
Thermoformed sheets
with a strength of over 1000N/mm2
Plastic
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Special body-in-white measures
To also guarantee the excellent vibration behaviour of
the cabriolet-coupé when the roof is open, extensive
reinforcements were made to the body-in-white in
addition to the use of the described sheet qualities.
In addition to the higher sills, the cross members on
the upper edges of the doors and the reinforcement
of the rear panel, they are mainly in the introduction
of a supporting front underbody capsule made from
aluminium and diagonal struts mounted in the rear
area.
The underbody capsule and diagonal struts are
bolted. The underbody capsule connects the front
subframe to the longitudinal members.
Together with the diagonal struts, this creates an
additional reinforcing level and thus increases the
torsional rigidity of the whole body.
Front subframe
Underbody capsule
Front module
Diagonal struts
Cross member
top edge of door
High sills
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Body
Pedestrian protection
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Deformation element
Pedestrian protection
cross member
Front-end frame
In the body development, greater focus has been
placed on pedestrian protection in addition to
occupant protection. The aim is to reduce the risk of
injury to pedestrians and cyclists by means of
constructive measures.
The Eos has a complete concept for the front end
that comprises the following measures:
- Sufficient spacing from hard engine compartment
parts under the bonnet
- Optimisation of hinges and interior sheets on the
bonnet
- Lower risk of leg injuries
Reduction of leg injuries
The Eos has an additional cross member for
pedestrian protection that has a deformation element
made from foam.
The deformation element absorbs a large proportion
of the energy in a collision so that the risk of severe
leg injuries is reduced.
In terms of car crash safety, we distinguish between
three different load levels that have to absorb the
forces in an accident.
The upper load level is formed by the roof, the middle
load level is the side structure of the vehicle and the
lower load level is the vehicle floor structure. On
cabriolets, the forces caused by a collision mainly
need to be absorbed by the centre and lower load
level because the roof construction is, to a great
extent, not part of the vehicle statics.
Crash safety
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Upper
load level
Centre
load level
Lower load level

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The aim of all crash safety measures is to preserve the
crash survival space inside the vehicle and provide
maximum protection for the occupants in accidents.
This is achieved by transferring the forces arising in
the collision specifically to the vehicle structure. In this
way, the degree of deformation at the point of impact
is reduced as the forces affect a larger area.
On the Eos, in frontal and side collisions, the forces
are distributed broadly across the centre and lower
load levels thanks to the reinforcing and stiffening
measures on the side and floor structure so that
maximum protection for occupants is guaranteed
even when the roof is open.
Absorption of
force in side collision
Absorption of
force in frontal collision
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Impact force
Impact force

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Body
Interior
Front seats
Three different front seat versions are available for
the Eos.
The standard equipment comprises a mechanical
8-way seat with a manual 2-way lumbar support. The
next equipment version up is the mechanical 8-way
seat with electrical 2-way lumbar support and
manual easy-entry function.
The top of the range version is the electrical 12-way
seat with electrical 4-way lumbar support and
electrical easy-entry function. On this front seat, you
can also adjust the seat tilt electrically.
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The rear seat bench in the Eos is produced in a new
manufacturing process. The wire frame is foamed into
the upholstery. The cover is glued to the upholstery.
This method is called “IN SITU” manufacturing.
The rear seat bench has two pairs of Isofix
anchors and three-point seat belts with belt force
limiters as standard.
A lockable through-load facility, which is also
standard, allows you to transport skis, for example.
Brackets for securing a first-aid kit are integrated in
the lid of the through-load facility. Once the lid has
been removed, you can reach the emergency boot
release.
Rear seat bench
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14
Body
A wind deflector is available as an optional extra
for the Eos. It folds into a small package with carrying
handle allowing it to be stored away in the boot.
Once unfolded, the wind deflector fits into the
mountings provided. It covers the rear seat bench
completely up to the head restraints. Finally, the
partition section folds up towards the front seats and
locks into place.
The wind deflector reduces the formation of
turbulence. It also helps keep the rear seat bench
clean.
Wind deflector
Unfolding wind deflector
Airflow with wind deflector
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When you drive the Eos as a coupé, a generous boot
with a volume of 380 litres is available.
If you want to drive with the roof open, the luggage
cover needs to be closed beforehand to protect the
cargo and, most importantly, the cabriolet roof from
damage. The boot still has a volume of 205 litres
when the roof is open and the luggage cover is
closed.
The roof can only be opened when the luggage cover
is locked in place. A microswitch checks if the cover is
positioned correctly. If the luggage cover is not closed,
a warning signal will sound and warning message will
appear in the dash panel insert display to inform the
driver about the problem.
Stickers on the left-hand and right-hand side of the
boot and on the luggage cover inform you that
nothing may be stowed there as the roof side
members and roof mechanism use this space when
the roof package is lowered.
Boot
Boot space in coupé
Luggage compartment cover
Warning stickers on sides
of boot
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Warning sticker on
luggage compartment cover

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Body
CSC stands for Coupé Sunroof and Cabriolet roof. It is
a multi-part folding roof made from steel sheet and
represents a completely new development with its
complicated electrohydraulic operation.
Since the roof has five parts, the A-pillar with the
wind-protection frame could be made shorter than on
other cabriolets. The windscreen therefore does not
extend too far over the interior meaning the driver
and front passenger are more in the open and
climbing in and out is easier. An electrical glass
sunroof integrated in the CSC roof with sliding
headliner also provides ventilation and light when
you are driving the car as a coupé.
The CSC roof and the externally running sunroof are
operated using a switch in the centre console. When
the roof is operated, the CSC roof segments are
placed one on top of each other in a sandwich and
are stored in the boot.
To support the driver when the roof is retracted,
the Eos Park Assist system is supplemented with the
function of a boot lid assist. It monitors the area
behind the Eos and ensures that the boot lid can move
in its full range when the roof is opened.
The Park Assist is available as an optional extra.
CSC roof
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You will find detailed information on the Eos onboard supply and electrics in self-study programme
SSP 379 “EOS 2006 – Electrical System”.

17
Roof mechanism
The CSC roof is made up of five main modules or
segments:
- The glass sunroof or ESS module for short
(ESS stands for external sliding sunroof),
- the M-segment with the centre part of the roof
frame and the electrical drive for the ESS module
functions,
- the C-segment with the rear windscreen and
- the left-hand and right-hand main drive with the
respective roof side members, the accompanying
locks and two hydraulic cylinders for each.
Together with the roof movement, the boot lid is
opened and closed to store the roof in the boot. The
movement of the boot lid with the necessary locking
and unlocking processes is also carried out by
hydraulic cylinders.
The boot lid mechanism is basically made up of the
following components:
- the boot lid
- the boot lid hinges
- the mounting frame
- 2 hydraulic cylinders on each side of the car
- the boot lid lock.
All in all, the complete movement procedure to open
and close the CSC roof is a complex interaction of
individual movements in which the completion of one
part of a step is often the requirement for the next
step to be carried out. The system is supported by an
extensive set of sensors that monitor the movement
and the position of the CSC roof.
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Sunroof module
CSC roof design
Roof side member
M-segment C-segment
Main drive
Boot lid
Mounting frame
Boot lid hinge
Boot lid lock

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Body
CSC roof drive
All roof movements together with the unlocking or
locking of the different components are made by the
four hydraulic cylinders for the CSC roof as well as
the four hydraulic cylinders for the boot lid
mechanism. Only the glass sunroof is powered by an
electric motor.
The following hydraulic cylinders are fitted on each
side of the car:
- 1 hydraulic cylinder in main hinge of CSC
roof (1)
- 1 hydraulic cylinder in side member of CSC
roof (2)
- 1 hydraulic cylinder in boot lid hinge (3)
- 1 hydraulic cylinder in boot lid mounting frame (4)
When the roof is operated, different lids and flaps are
opened or closed while the CSC roof is stowed away
completely or closed again. These movements, like the
locking and unlocking of roof components, are also
carried out by a clever system of mechanical
couplings with the help of rods and Bowden cables
via the Eos hydraulic cylinder.
When the roof is operated, parts of the interior
panelling also have to follow the movement of the
roof. The whole mechanism of these components has
been constructed without additional drives like
electric motors, for example.
Hydraulic cylinder in boot lid mounting frame (4)
Hydraulic cylinder in boot lid
hinge (3)
Hydraulic cylinder in main hinge (1)
Hydraulic cylinder in roof side member (2)
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Tasks of the hydraulic cylinders
1. Hydraulic cylinders in main hinges
- Lowering the roof package into the boot or lifting the
roof package out of the boot
- Performance of a desmodromic sideways swinging movement of the roof side members
2. Hydraulic cylinders in roof side members
- Swinging the C-segment over the M-segment when opening the roof and
swinging back the C-segment when closing the roof
- Locking and unlocking the roof side members on the A-pillars
- Locking or unlocking the C-segment on the M-segment
3. Hydraulic cylinders in the boot lid hinges
- Carrying out the swinging movement of the boot lid
- Opening and closing the roof side member flaps via cables
4. Hydraulic cylinders in mounting frame
- Locking and unlocking the mounting frame to/from the boot lid for roof movement
- Unlocking or locking the mounting frame from/to the body when roof
completely open or closed
- Opening and closing the covering flaps using cables
Convertible roof
actuation control
unit
Hydraulic unit
Hydraulic cylinder in roof side member (2)
Hydraulic cylinder in main hinge (1)
Hydraulic cylinder
in mounting frame
(4)
Hydraulic cylinder in
boot lid hinge
(3)
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C-segment
M-segment
Mounting frame in
boot lid

20
External sliding sunroof
The name “External Sliding Sunroof” (ESS) refers to
the sunroof running over the M-segment and not
under the roof panel as usual. The glass sunroof is
operated with the inner part of the roof switch.
Depending on how long the switch is pressed, an
automatic run or a manual run can be carried out.
Sunroof operation
If you press the switch for longer than 0.5 seconds, an
automatic run is started that moves the sunroof to
ventilation position and stops there. Pressing the
switch again for less than 0.5 seconds starts a second
automatic run that opens the sunroof completely.
If you press the switch for longer than 0.5 seconds
when the sunroof is closed, a manual run is started.
The sunroof opens manually for as long as the switch
is pressed. Once it passes the ventilation position, the
control unit switches to automatic mode and opens
the sunroof completely.
When closing the sunroof, there is also an automatic
and manual mode.
In manual closing mode, you can also stop the
sunroof in an intermediate position by letting go of
the switch.
Body
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