Chassis S7010001 & Later

For diagnosis of the car's electronic systems, a 16-pin data link connector is located under the dashboard adjacent to the steering column.

Current is supplied to the data link connector via fuse 13. The connector has power ground on pin 4 and signal ground on pin 5.

The following systems are connected to the data link connector as indicated:

Pin 1 Main instrument display panel 2(540B)
Audio 2 and 3 (359B, C)
SID units 2 and 3 (541B, C)
Automatic Climate Control (ACC) unit (216)
Pin 4 Power ground
Pin 5 Signal ground
Pin 6 Lamp-flash code (I lead)
Motronic 2.10.3 (505)
Motronic 2.8.1(510)
Pin 7 Transmission Control Module (502)
Motronic 2.10.2 (505)
Motronic 2.8.1(510)
Trionic (430)
Pin 8 Airbag(331)
ABS (547)
Integrated Central Electronics (500)
Traction Control System (507)
Anti-theft alarm (289)
Electrically adjustable driver's seat (357)
Sensonic (509)
Top Stack Actuation System (565)
Pin 9 Main instrument display panel 2(540B)
Audio 2 and 3 (353B, C)
SID units 2 and 3 (541B, C) ACC unit (216)
Pin 11 Electrically adjustable driver's seat (357K)
Pin 14 Fuel pump relay 102 via anti-theft alarm control module 289
Pin 16 Power supply (+30 circuit)

FAULT DIAGNOSIS HINTS
1 Check that fuse 13 is intact and supplied with current.
2 Check that communication can be established with other systems connected to the same connector. If negative, check the wiring.
3 Check The Wiring, connectors and ground connections.