Disconnecting, connecting engine wiring harness

AR01.00-P-2410GT

Disconnecting, connecting engine wiring harness

14.2.12

 

Removing/installing

1

Activate Service mode in Tele-Aid emergency call system

 Only for models 463.243/244/245/247/248/
250/254/270 with Tele-Aid car phone emergency call system code ET2.

AR82.95-P-0005-03GR



Notes regarding the Tele-Aid emergency call system

Models 463.243/244/245/247/248/250/ 254/270/309/322/323/332/333 Tele-Aid car phone emergency call system code ET2

AH82.95-P-0001-01GA

 Danger!

Risk of explosion caused by escaping oxyhydrogen gas. Risk of injury caused by caustic burns to eyes, skin and mucous membranes from battery electrolyte (contains diluted sulfuric acid) or metal spatter due to short circuit. Risk of burn injuries caused by short circuit. Risk of poisoning caused by swallowing battery electrolyte (contains diluted sulfuric acid) or absorption of lead over the skin or orifices

No fire, sparks, open flames or smoking.

Wear acid-resistant gloves and clothing and safety glasses with side guards.

Do not place any conductive objects on the battery and avoid any short circuit from battery positive to ground.

Only fill liquid battery electrolyte (diluted sulfuric acid) into suitable and appropriately marked containers.

AS54.10-Z-0001-01A

2

Disconnect ground cable (10) on battery

 Except model 463.248 with special protection version code 979.

AR54.10-P-0003G

Model 463.248
with special protection version code 979,
special protection version FB6 code ZS6,
special protection version FB7 code ZS7,
additional battery 100 Ah incl. cutoff relay code E26.

AR54.10-P-0003PM



Notes on battery

All models

AH54.10-P-0001-01A

3

Remove air plenum chamber and water collector

AR83.10-P-9998GM

4

Remove dust shield (1)

5

Disconnect electrical connectors (A) on ME control unit (N3/10)

 Press plastic catch down and turn over locking arm.

6

Remove glove compartment

AR68.10-P-1400GM

7

Disconnect module box/engine separation point (X35/26)

8

Remove cover below right instrument panel

AR68.10-P-1520GM

9

Disconnect electric cables (4) onfront signal acquisition and actuation module (SAM) (N10/1)

10

Pull engine wiring harness out of body opening

 Do not damage wiring harness when pulling it out otherwise this may result in operational problems in the connected equipment.

11

Connector for O2S sensor on the left, upstream of TWC (G3/3x1) and connector for O2 sensor on the right, upstream of TWC (G3/4x1).

12

Connector for O2S sensor on the left, downstream of TWC (G3/5x1) and connector for O2 sensor on the right, downstream TWC (G3/6x1).

13

Remove ignition coils

 Only remove ignition coils from cylinders 5 to 8.

AR15.12-P-2003A

14

Remove cover on jump-starting point (2)

15

Unbolt electric cable of circuit 30 (3) on terminal block engine circuit 30 (X4/30)

16

Remove ground line on starter

17

Separate plug connection of automatic transmission (X22/2) on automatic transmission

18

Unscrew bolt (13) and remove transmission output speed sensor (B49)

Installation:

Replace O-ring on transmission output speed sensor (B49).

19

Install in reverse order

20

Deactivate service mode in TELE AID emergency call system

 Only for models 463.243/244/245/247/248/
250/254/270 with Tele-Aid car phone emergency call system code ET2.

AR82.95-P-0005-03GR

21

Read out fault memory and erase

 STAR DIAGNOSIS
Stored faults which can result from cables being disconnected or from simulation during removal and installation or test work, have to be processed and erased in the fault memories after completing the work.



Connect up STAR DIAGNOSIS and read out fault memory

AD00.00-P-2000-04A

*WH58.30-Z-1048-13A

Number

Designation

WH58.30-Z-1048-13A

STAR DIAGNOSIS diagnosis system, Compact Passenger Car

6511 1801 00