Part No. ZEKMR001CN
MERCEDES BENZ
C-Class W204 Saloon
03/07
C-Class S204 Estate
12/07
C-Class C204 Coupe
06/11
Electric wiring kit for towbars / 7-pin / 12N / 12 Volt / ISO 1724
IMPORTANT!
Fitting instructions
Installation of the towing electrics kit must be undertaken
by a specialist workshop or an appropriately qualified
person. Before starting work, you must read the installation
instructions through completely. After installing the towing
electrics kit, the installation instructions should be kept
with the vehicle service documentation.
In case of missing a rear fog lamp on the trailer, it should be retrofitted.
All claims under the guarantee will lapse in case of improper use or
modification of the towing electrics kit or any of its component parts.
When driving without a trailer or load carrier, any adapter installed
must be removed from the electrical socket. We reserve the right to
alter the design, content or colour. We accept no liability for any
errors in these instructions. All details and illustrations are nonbinding.
The trailer module is not diagnostics-capable. If the manufacturer’s
diagnostics processes or software-supported test mechanisms
generate error reports directly or indirectly linked with trailer operation,
the trailer module must be disconnected from the leads to the trailer
socket and a new diagnostic process initiated.
87040864 / 10.01.2013
© ConWys AG
We accept no responsibility and give no guarantee for technical and
electrical modifications made after the initial operation of the towing
electrics kit by the vehicle manufacturer and which may lead, for
example to malfunction of the trailer socket or its peripheries.
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Technical Support No:
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15A
2x
5A
MAN
UAL
2x
3x
2x
2x
10x
5x
15-26
6,
9 -14
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SYMBOL EXPLANATION
left (58-L) respectively
right (58-R) tail light
12
V
stop light (54) /
high mounted, third stop light (54)
turn signal indicator left
loudspeaker / buzzer
P
Park Distance Control
switch / source of function
turn signal indicator right
everse
Reverse
B+/30
B+/30
20A
cigarette lighter /
accessory socket
rear fog light(s)
Connect together
reversing light(s)
Disconnect
Permanent power supply /
13pin socket, chamber 9
Look at / See further information
charging wire for trailer battery /
13pin socket, chamber 10
Look carefully at selected area
trailer / trailer recognition
Present / Occupied / OK
Permanent current power supply
Not present / Not occupied / Not OK
Ground or Earth (31)
left
ground connection battery terminal lug
right
positive connection battery terminal lug
acoustic indication
fuse / fuse capacity 20 Ampère
attention / important advice
Tools
Keyless-go
Chipcard /
Entry Card
10m
1
90040115
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2
90040116
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o
C
o
C
ATTENTION!
The vehicle's cooling capacity may have to be increased when retrofitting a trailer coupling! You must observe the
manufacturer's instructions!!
ATTENTION!
MANUAL
In order to avoid mal-functions and damage to the vehicle’s electrical system the earth terminal must be disconnected
from the vehicle’s battery before starting work!
Both the trailer module and the vehicle’s control unit for the electrical system can be damaged during work on the
CAN data bus connections if the battery is not disconnected!
Please pay attention to the manufacturer’s instructions when disconnecting and reconnecting the vehicle’s battery!
90010216
3
C-Class W204 Saloon
C-Class C204 Coupe
6.
1.
4.
2.
5.
3.
4
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C-Class S204 Estate
5.
1.
4.
2.
3.
5
40mm
6
7
40mm
8
90040123
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9
90500378
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Belegung der Steckdose / Maximale Ausgangsleistung
Socket configuration / Maximum power output
Correspondance des contacts de la prise / Puissance de sortie maximale
Abbinamento della presa / Uscita di alimentazione massima
Indeling van de stekkerdoos / maximaal uitgangsvermogen
ISO 1724
1/L
BK/WT
21W
2
WT
42W
3/31
BR
4/R
BK/GN
21W
5/58-R
GY/RD
52W
6/54
BK/RD
63W
7/58-L
GY/BK
52W
90500548
11
10
L/R
Choose direction
12
90500002
90500580
14
90500684
13
GB
D
E
BK
Black
Schwarz
Negro
Noir
RD
Red
Rot
Rojo
Rouge
F
I
P
NL
DK
N
S
Nero
Preto
Zwart
Sort
Svart
Svart
Rosso
Vermelho
Rood
Rød
Rød
Röd
CZ
H
Musta
Cerná
Fekete
Czarny
Punainen
Cervená
Piros
Czerwony
FIN
PL
GN
Green
Grün
Verde
Vert
Verde
Verde
Groen
Grøn
Grønt
Grön
Vihreä
Zelená
Zöld
Zielony
OR
Orange
Orange
Naranja
Orange
Arancione
Laranja
Oranje
Orange
Orange
Orange
Oranssi
Oranzová
Narancs
Pomaranczowy
VT
Violet
Violett
Violeta
Violet
Viola
Violeta
Violet
Violet
Fiolett
Violett
Violetti
Fialová
Ibolya
Fioletowy
PK
Pink
Pink
Pink
Rose
Rosa
Cor-de-Rosa
Paars
Pink
Pink
Rosa
Pinkki
Ruzová
Rózsaszín
Rózowy
BL
Blue
Blau
Azul
Bleu
Blu
Azul
Blauw
Blå
Blått
Blå
Sininen
Modrá
Kék
Niebeski
YL
Yellow
Gelb
Amarillo
Jaune
Giallo
Amarelo
Geel
Gul
Gult
Gul
Keltainen
Zlutá
Sárga
Zólty
WT
White
Weiss
Blanco
Blanc
Bianco
Branco
Wit
Hvid
Hvitt
Vit
Valkoinen
Bílá
Fehér
Bialy
BR
Brown
Braun
Marrón
Brun
Marrone
Marrom
Bruin
Brun
Brunt
Brun
Ruskea
Hnedá
Barna
Brazowy
GY
Grey
Grau
Gris
Gris
Grigio
Cinzento
Grijs
Grå
Grått
Grå
Harmaa
Sedá
Szürke
Szary
SAM - Backside
15
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connector 28 pin BL available
17 - 22
25 - 38
connector 28 pin BL not available
21 - 38
16
connector 28 pin BL
17
18
CAN-Data wire
chamber 9
YL
BK
chamber 10
Wichtig!
Unbedingt Hinweise
aus Bild 3 beachten!
19
20
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SAM - Frontside
Power Feed Trailer Module
2x
15A
chamber 1+2
BL
Brakelights Trailer
5A
chamber 6
21
22
Important!
Please note
informations
in picture 3!
BR/RD
CAN-Data Wire
BR/RD
BR
BR
YL
BR
BK
YL
YL
BK
BR/RD
BK
23
Re-install SAM
24
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Important!
Please note
informations
in picture 3!
25
ooooooooooooooooo
X00000000
Important!
Please note
informations
in picture 3!
26
MERCEDES
BENZ
MERCEDES
BENZ
MERCEDES
BENZ
SERVICE
MA
NU
MERCEDES
BENZ
AL
MANUAL
SERVICE
90270310
27
OPTIONAL
everse
BL/YL
MA
NU
AL
12S
Supplementary harness
28
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38400501
90500652
90270309
29
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Programming
MANUAL
30
page 11
90500004
everse
LED
31
90500507
32
OPTIONAL
Trailer Simulator
for 7- and 13-pin
Sockets
everse
evers
e
Perm Daue
anen rstro
t powe m
r supp
PIN
ly
9
Part-no.
Lade
Char
leitun
ging
traile
wire g
PINr battery for
10
50400521C
33
Optional: Adapter socket 62400001
7-pin
34
90500331
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© ConWys AG
13-pin
35
90500543
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Technical Support No:
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SETUP
LOCK
ON
1.
P
36
2.
1x
Ignition ON
3.
P
4.
Set up trailer operation
The activation of the trailer functions
has to be carried as follows:
1. Connect computer to car
2. Start program
3. Click "Special functions"
4. Click "Input for retrofits or conversions"
5. Enter you user name and password
6. Write 550 in the upper (+) field
7. Accept and close the program.
8. Start the program again
9. Click "Controllers View"
10. Click "CGW" (Central Gateway)
11. Click "Adjust"
12. On the left side: click Configuration
SCN encoding
13. Go online a wait a few seconds
14. In the middle of the list shown there is an
entry 550 (with a + alongside).
15. Accept
16. Done
37
P
P
38
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Diagnosis function of control LEDs
a
GN
RD
No CAN-Data
=
Standby /
Sleepmode
b
GN
c
GN
d
CAN-Data Wire PIN 13+14
RD
or
/31:
PIN 1
RD
e
2 x B+/30:
PIN 2 + 4
RD
Lamp substitution if the trailer indicators fail
The failure of a trailer indicator (right left or both sides) is reported to the driver in the towing vehicle's combi-instrument
via a text message in the display, an increase in the flashing frequency and/or a control lamp for light failure
coming on.
If an indicator fails the left or right rear tail light compensates for the faulty indicator by flashing at the correct frequency!
If the indicator is activated, the corresponding rear tail lamp on the trailer becomes the indicator
( lamp substitution): NOTE! The lamp substitution does not work if the Hazard warning lights have been
activated.
87040864 / 10.01.2013
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Technical Support No:
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