Water Heater Unit
Thermo Top C Auxiliary Heating
e1
00 0002
Installation Instructions
Mercedes Benz W203
(C Class)
Gasoline and diesel
1
2
From model year 02
3 4
For left-hand drive vehicles only
Not for AMG look
1
Legend for figure 1:
1 Thermo Top C Heater Unit
2 Metering pump
3 Antenna Option
4 Receiver Option
Warning!
Hazard warning:
Incorrect installation or repair of Webasto heating systems may cause a fire or result
in the emission of carbon monoxide, which can be fatal. Serious or fatal injuries can
be caused as a result.
Specialist company training, technical documentation, specialized tools and
equipment are required to install and repair Webasto heating and cooling systems.
NEVER attempt to install or repair Webasto heating or cooling systems if you have not
successfully completed the company training and thereby acquired the required
technical skills or if you do not have access to the required technical documentation,
tools and equipment needed to carry out correct installation and repairs.
ALWAYS follow all Webasto installation and repair instructions and observe all
warning instructions.
Webasto does not accept any liability for defects and damage that are attributable to
an installation by untrained staff.
Ident. No.: 9015593A
€10 fee
© Webasto AG
Mercedes Benz W 203
Table of Contents
Validity
2
Heater Unit / Foreword / Special Tools
3
Explanatory Notes on the Document
4
Preliminary Work / Installation Location
5
Electrical Diagram
6
Remote Start and Thermo Call
7
Heater Unit Assembly
8
Pre-assembling and Assembling the Metering
Pump
9
Fuel Take-off / Fuel Lines
10
Fuel Lines / Connecting to the Heater Unit 11
Water diagram
12
230 Compressor Hose System
13
220CDI/320 CDI Hose System
14
Final Work
15
Operating Instructions for the End Customer 16
Validity
Manufacturer
Model
Type
EG-BE No. / ABE
Daimler
Chrysler
Mercedes Benz C Class
W 203
e1*98 / 14*0139 to * 0159
Engine type
Engine
Power in kW
Engine capacity in cm³
C 180
Gasoline
95
1998
C 180 K
Gasoline
105
1796
C 200
Gasoline
120
1998
C 200 K
Gasoline
120
1796
C 230 K
Gasoline
145
2295
C 240
Gasoline
125
2597
C 320
Gasoline
160
3199
C 350
Gasoline
200
3498
C 200 CDI
Diesel
85
2148
C 220 CDI
Diesel
105
2148
C 270 CDI
Diesel
125
2685
C 320 CDI
Diesel
165
2487
Vehicle types, engine types and equipmentvariants, which are not listed in these installation
instructions, have not been tested.
Installation according to these installation instructions may, however, be possible.
2
Mercedes Benz W 203
Heater Unit / Scope of Delivery
Quantity Name
Order No.
Scope of Delivery Water heater unit Thermo Top C-B
W 203 sedan/station wagon up to model year 03
1
9011466A
1
Scope of Delivery Water Heater Unit Thermo Top C-D
W 203 sedan/station wagon up to model year 03
9011465A
1
Scope of Delivery Water heater unit Thermo Top C-B
W203 Sport coupé to model year 03
9011468A
1
Scope of Delivery Water Heater Unit Thermo Top C-D
W203 Sport coupé to model year 03
9011467A
1
Scope of Delivery Water heater unit Thermo Top C-B
W 203 sedan/station wagon up to model year 03
9010977A
1
Scope of Delivery Water Heater Unit Thermo Top C-D
W 203 sedan/station wagon up to model year 03
9010976A
1
Scope of Delivery Water heater unit Thermo Top C-B
W203 Sport coupé from model year 04
9011508A
1
Scope of Delivery Water Heater Unit Thermo Top C-D
W203 Sport coupé from model year 04
9011509A
Optional:
Remote start:
9011461A
Thermo Call: 9001132B (only in connection with the Y adapter ID no. 9010325B
and remote start ID no. 9011461A)
Along with the remote start and thermo call options, the basic scope of delivery can also be equipped
with a direct start button in the center console.
The required parts, press switch, center console, and UBF – OBF cable harness, can be ordered
directly from DaimlerChrysler for the vehicle and are to be assembled according to the
manufacturer’s requirements.
Foreword
These installation instructions apply in respect of Mercedes W203 vehicles with gasoline/diesel
engines – re. validity, see page 2 - as from model year 2002 and later, assuming technical
modifications to the vehicle do not affect installation, any liability claims excluded.
Special Tools
- Torque spanner for 2.0 - 10 Nm
- Vise-grip wrench
3
Mercedes Benz W 203
Explanatory notes on the document
To provide you with a quick overview of the individual working steps, you will find an
identification mark on the outside top right corner of the page in question.
Mechanical work
Electrical connection
Water connection
Fuel connection
Exhaust system
Combustion air
Special features are highlighted using the following symbols:
Specific risk of injury or fatal accidents.
Specific risk of damage to components.
Specific risk of fire or explosion.
i
(
Reference to general installation instructions of
Webasto components or to the manufacturer's
vehicle-specific documents.
Reference to a special technical feature.
The arrow in the vehicle icon indicates the
position on the vehicle and the viewing angle
4
Mercedes Benz W 203
Warning!
Pre- Remove the passenger compartment filter in the engine compartment
liminary
- Disconnect the battery and remove it!
- Remove the battery base plate.
- Let off pressure in the cooling system.
- Copy the factory number from the original type label to the duplicate type label.
- Remove years that do not apply from the duplicate label.
- Attach the duplicate label (type label) in the appropriate place.
- Open the tank cap, ventilate the tank.
- Close the tank cap again.
- Remove the right front wheel.
- Remove front right headlight.
- Remove the cover strip for the towing hook on the front right bumper.
- Remove the underride protection on the right side of the vehicle.
- Remove the rocker panel strip on the front passenger side and the front and back of the driver’s
side.
- Remove the A-pillar panel in the driver’s side and passenger side footwell.
- Remove the lower dashboard panel on the passenger side, loosen on the driver’s side
- Remove the cover of the fuse box on the driver’s side of the dash board.
- Remove the gas pedal.
- Remove the floor carpet on the driver and passenger side
- Remove the air channels for the rear seat heating in the driver’s side and passenger side footwell.
- Remove the floor mat in the trunk.
- Remove the cover plate for the cable duct behind the rear seat bench.
- Remove the side trunk panelling on the driver’s side.
- Loosen the fuse and relay box (SAM) in the trunk.
- Remove the antenna cable from the cable harness (is not required).
1
(1) Heater unit
Heater Unit
Installation
Location
2
5
Mercedes Benz W 203
Installation should be carried out according to the general, standard rules of technology. Unless Conspecified otherwise, you should fasten to original vehicle lines and cable harnesses using cable clips. nection
Sharp edges should be fitted with edge protectors!
Electrics
Grounding point in front
Cable harness duct in front
(1) Grounding point
(2) Grounding cable
(1) Cable harness to the
heater unit
(2) Cable feed-through
Connection to the SAM
controller unit
On the rear fuse and relay box
(
(1) Fuse/relay module
(2) Connector on the SAM
controller (blue)
1
1
2
2
2
1
3
4
5
i
CAN nodes
to model year 04
Electrics
diagram
CAN nodes from
model year 04
1
3
2
1
1
2
(
2
3
6
7
8
Fuse holder
CAN bus connection
Left grounding point
(1) Fuse holder (on yellow
connector)
(2) Fuse holder
(3) Dashboard
(1) CAN plug connector
(2) CAN cable harness
(3) Rocker panel cable conduit
(1) Rocker panel cable conduit
(3) Grounding point
6
Mercedes Benz W 203
1
Remote start option
2
Slide the remote control receiver on the
bracket tracks on the fuse and relay box.
3
(1) Remote start receiver
(2) Fuse and relay box
(3) Remote start cable harness
(4) Antenna cable
(
Remote
start T90
4
9
(1) Adhesive antenna remote start
(2) Trunk ledge
1
Assembling the
adhesive
antenna
2
10
Thermo Call option 13
2
Connect the ThermoCall cable harness
with the Y-adapter and the remote start
cable harness and insert in the remote
start receiver.
1
(1) Thermo Call cable harness
(2) Thermo Call housing
(
Thermo
Call TC 1.1
11
(1) Thermo Call adhesive antenna
(2) Trunk ledge
1
i
Assembling the
adhesive
antenna
2
12
7
Mercedes Benz W 203
Fasten the heater unit bracket with edged
bolts to the
front frame.
2
(
(1) M6x16 edge bolts [2x]
(2) Front screen
Assembling the
Heater Unit
1
13
2
Fasten the heater unit bracket with two
edged bolts.
3
(1) M6x16 edge bolts with body washer
(2) M6x16 edge bolts
(3) Heater unit bracket
(
Assembling the
Heater Unit
1
14
8
Mercedes Benz W 203
CAUTION!
Open the vehicle's tank-cap lock, ventilate the tank and then re-close the tank lock.
Fuel
connection
Catch any fuel running off with an appropriate container.
Install the fuel line so that it is protected from impact by rocks!
Fit the fuel line with edge protectors around sharp edges.
1 2
3
4
5
(1) Mecanyl fuel pipe to the heater unit
(pressure side)
(2) Universal clip [4x]
(3) Straight hose section
(4) Connection to metering pump cable
harness
(5) Metering pump
(6) 90° moulded hose
(7) Mecanyl fuel pipe to the tank (suction
side) shortened to 900 mm.
6
(
Preassembling the
metering
pump
7
15
1
2
(1) Angle bracket
(2) M6x30 bolt
(3) Metering pump bracket
(4) Flanged nut M6
(5) Metering pump cable harness
(
3
Preassembling the
metering
pump
5
4
16
1
(
2
3
4
Installation location to the left above the rear
axle.
Screw on two brackets for the fuel line on the
original vehicle stay bolts behind the rear axle
mounting to the left and right of the differential
housing.
Assemble the bracket on the original vehicle Preparing
stay bolts.
the
Remove the original vehicle grommet.
metering
pump
(1) Line clips [2x]
installation
(2) Angle bracket
location
(3) Plastic nuts [2x]
(4) Bore grommet
17
9
Mercedes Benz W 203
Note the installation position of the metering
pump,
see the "installation instructions"
Fasten the pre-assembled metering pump to
the angled bracket with bolt M6x25 and
flanged nut.
3
2
1
4
(1) Metering pump bracket
(2) Metering pump
(3) Angle bracket
(4) M6x20 bolt
i
Assembling the
metering
pump
18
1
2
3
4
19
Cut off the nipple on the fuel take-off for the
fuel container with a knife.
Place the hose section on the fuel take-off
and fasten with universal clips.
Insert the preassembled fuel line to the
metering pump intake in the hose section for
the tank extracting device and
fasten with universal clips.
Clip the Mecanyl fuel line into the preassembled line bracket.
(1) Fuel pipe to the heater unit
(2) Shortened Mecanyl line to the
metering pump
(3) Universal clips [2x]
(4) Hose section
Run the Mecanyl fuel pipe along the tank belt
and fasten with cable clips.
(1) Mecanyl fuel pipe to the heater unit
(2) Tank fastening belt
(
Fuel takeoff
(
Running
the lines
1
2
20
Screw the bracket for fuel lines onto the
existing stay bolts. Clip the Mecanyl fuel line
into the bracket and run to the front in the
opening for the frame side rail.
1
2
3
(1) Bracket for fuel lines [4x]
(2) Mecanyl fuel pipe
(3) Frame side rail opening
(
Run the
fuel line
along the
underbody
panel and
fasten
21
10
Mercedes Benz W 203
1
2
Remove both oval protective rubber sleeves
in the frame side rail, run the Mecanyl fuel line
through the rear opening and pull through.
Then lead this back into the rear opening,
push out to the front and lead through the
front grommet opening.
3
(1) Rear grommet opening
(2) Mecanyl fuel pipe
(3) Front grommet opening
(
Running
lines
22
Reinsert the rear grommet, drill d= 5 mm in
the front grommet, place on the Mecanyl fuel
line and insert again.
Screw the hose bracket onto the existing
stay bolts.
Clip the Mecanyl fuel line into the hose
bracket.
2
1
(1) Front grommet opening in frame side rail
(2) Hose bracket [2x]
(3) Hose bracket
(4) Mecanyl fuel pipe
3
4
1
2
3 4
Installing
the fuel
line
23
Shorten the Mecanyl fuel pipe on the heater
unit and connect.
Add the wear protection hose and fasten with
cable clips.
5
(1) Wear protection hose
(2) Mecanyl fuel pipe
(3) Universal clip [2x]
(4) Hose section
(5) Heater unit
(
Fuel on
heater unit
24
11
Mercedes Benz W 203
WARNING!
Tighten all hose clamps with 2.0 + 0.5 Nm.
Any cold water running off should be collected using an appropriate container!
Install hoses so that they are kink-free and to prevent wear.
Position hose clamps so that no other hose can be damaged!
The connection should be "inline" based on the following diagram:
(
WT
O 25
18/20
O 27
Water
diagram
(shown on
230K hose
system)
without
residual
heat pump
M
A
O 27
20/20
O 27
O 27
C
O 27 20/18 O 25
B
25
On vehicles with a residual heat pump, the hose placement in the engine area
may vary slightly.
(
12
Mercedes Benz W 203
A
a = 210 mm
b = 70 mm
c = 90° bend (remaining)
B
Dispose of section 8
(230K
without
residual
heat pump)
8
a
(
Cutting
water
hoses into
sections
b
C
26
Separate the original vehicle engine hose on
the marking.
(1) Original vehicle hose
1
(
Splitting
point.
(230K
without
residual
heat pump)
27
1
2
3
Insert the connecting pipe in the hose ends
and fasten with clips.
Slide the rubber ring onto the hose to the
engine.
(1) Vise-grip wrench
(2) rubber ring
(3) Clips d=25 [2x]
(4) Connecting pipe 18-20 [2x]
Connecting pipe
(230K
without
residual
heat pump)
4
28
2
1
3
4
5
6
29
Connect the water hoses with the
connecting pipe and clips according to the
figure and diagram.
Position the rubber ring on the frame side rail.
Connect
Fasten the hoses with spacers (clips).
hoses
(1) Rubber ring (wear protection)
(230K
(2) Clips d=25 [2x]
without
(3) Clips d=27 [6x]
residual
(4) Hose spacers [2x]
heat pump)
(5) Hose from header unit outlet to engine
inlet
(6) Hose from heat exchanger outlet to heater
unit inlet
13
Mercedes Benz W 203
A
C
a = 360 mm
b = 170 mm
c = 20 mm
B
Dispose of section 8
(220 CDI
without
residual
heat pump)
8
a
c
b
8
1
8
A
Cutting
water
hoses into
sections
30
Only 220 CDI/320 CDI
Cut the braided protective hoses to 220 mm
and slide onto hose A.
2
(1) Connecting pipe 18-20
(2) Braided protective hose
(3) Clips d=27 [3x]
(4) Connecting pipe 20-20
(220 CDI
without
residual
heat pump)
B
C
4
3
Preassembling the
hoses
31
(1) Original vehicle hose for the engine inlet
1
Splitting
point
(220 CDI
without
residual
heat pump)
32
3
4
5
2
1
6
(1) Spacer bracket [2x]
(2) Braided protective hose
(3) Rubber ring
(4) Original vehicle hose to the engine inlet
(5) Clips d=25 [2x]
(6) Clips d=27 [6x]
Connect
hoses
(220 CDI
without
residual
heat
pump)
33
14
Mercedes Benz W 203
WARNING!
Reassemble disassembled components in reverse order.
Final
work
Check that all hose lines, hose and universal clips, and all electrical connections are securely fastened.
Secure all loose lines using cable clip.
Spray heating unit components with anti-corrosion wax (Tectyl 100K, Order No. 111 329).
- Connect battery.
- Start engine, bleed water circuit according to the vehicle manufacturer's specifications, top up with
cold water, check that the cooling system is sealed according to the manufacturer’s
recommendations.
Release the auxiliary heater function:
i
After assembly, follow the manufacturer’s instructions for star diagnosis to code the auxiliary heater.
- Set the vehicle heating with automatic air conditioning or without automatic air conditioning according
to the "operating instructions for the end customer".
- Check that the auxiliary heating operates properly, see operating instructions / installation
15
Mercedes Benz W 203
(Please remove page and insert with vehicle operating instructions.)
Operating
instructions for
the end
customer
Before parking the vehicle, make the following settings:
Set the heater times with the steering wheel buttons when the key is in position 1 or 2 (ignition)
or when the engine is running.
- Press the up or down steering wheel menu buttons until the “Settings” menu appears.
- Move the arrow buttons up or down until the “Auxiliary Heating” menu appears.
- Press +/- to set the start times 1 to 3.
- Use the arrow button to select the time setting
- Press +/- to set the start time for the auxiliary heat.
- Exit the menu, the start time is saved.
Options:
- The optional "Auxiliary heat/vent" button in the center console is for immediate heating and
ventilation (see also the vehicles operating manual).
- Use the optional remote start to directly start the auxiliary heat.
(see also the vehicle operating instructions).
- Use the optional Thermo Call to start the auxiliary heat over the telephone.
16
Webasto Thermosysteme International GmbH
Postfach 80 - 82132 Stockdorf - Hotline 0 18 05 / 93 22 78
Hotfax (0395) 55 92-353 - http://www.webasto.de
Printed in Germany
04/06
Printed by: Steffen