Connector Layout of Data Link Connector

38-pole Data Link Connector (X11/4)
Models 124, 129, 140, 170, 202, 208, 210

1 Ground, circuit 31 (W12, W15, electronics ground)
2 Voltage, circuit 87 or circuit 152
3 Voltage, circuit 30
4 EDS Electronic diesel system
4 DFI Electronic distributor-type fuel injection (Diesel)
4 IFI Electronic In-line fuel injection (Diesel)
4 HFM-SFI HFM sequential multiport fuel injection/ignition
4 LH-SFI LH sequential multiport fuel injection, Engines 104,119, Engine 120 (right)
4 ME-SFI ME sequential multiport fuel injection/ignition, Engine 119, Engine 120 (right)
5 LH-SFI LH sequential multiport fuel injection, Engine 120 (left)
5 ME-SFI ME sequential multiport fuel injection/ignition, Engine 120 (left)
6 ABS Anti-lock brake system
6 ETS Electronic traction system
6 ASR Acceleration slip regulation
6 ESP Electronic stability program
7 EA Electronic accelerator
7 CC/ISC Cruise control/idle speed control
8 BM Base module
8 BAS Brake assist
9 ASD Automatic locking differential, Models 124,129,140
10 ETC Electronic transmission control (A/T 5spd)
10 ETC Electronic transmission control
11 ADS Adaptive damping system
12 SPS Speed-sensitive power steering
13 TNA-signal (gasoline), LH-SFI engines
13 TD-signal (Diesel), Model 210
13 TN-signal (gasoline), HFM (ME)-SFI engines
14 On-off ratio, Engine 119 LH-SFI, Engine 120 LH-SFI (right)
15 On-off ratio, Engine 120 LH-SFI (left)
15 IC Instrument cluster
16 A/C Air conditioning, Models 124, 140, 202, 208, 210
16 TAU Tempmatic air conditioning, Model 170
17 DI Distributor ignition, Engines 104, 119, Engine 120 (right)
17 TD-speed signal (time division) (diesel), Model 140
17 TN-speed signal, LH-SFI engines, HFM, Model 202
18 DI Distributor ignition, Engine 120 (left)
19 DM Diagnostic module (USA)
20 PSE Pneumatic system equipment, Model 140
20 CCM Combination control module, Model 210
21 CF Convenience feature, Model 140
21 RST Roadster soft top, Model 129
22 RB Roll bar, Model 129
23 ATA Anti-theft alarm
24-25 Not used
26 ASD Automatic locking differential, Model 202
27 Not used
28 PTS Parktronic system, Model 140
29 Not used
30 AB Airbag/ETR (SRS)
31 RCL Remote central locking
32-33 Not used
34 CNS Communication and navigation system
35 Not used
36 Not used
37-38 Not used


16-pole Data Link Connector (X11/4 or X11/4s1)
Models 124 (except .034/036).
129 (except .060/066)







X11/4
1 Ground
2 Not used
3 CFI Continuous fuel injection (CIS-E)
4 EDS Electronic diesel system
5 4MATIC
6 AB Airbag/ETR (SRS)
7 A/C Air conditioning, Model 124
7 RB Roll bar, Model 129
8 DI Distributor ignition
8 HFM-SFI HFM sequential multiport fuel injection/ignition
8 PEC Pressurized engine control
9 ADS Adaptive damping system
9 RB Roll bar, Model 124
10 TN-signal (Gasoline)
11 ATA Anti-theft alarm
12 RCL Remote central locking
13 ETC Electronic transmission control
14 EA Electronic accelerator, Model 124
14 CC/ISC Cruise control/idle speed control, Model 124
14 ESCM Engine systems control module (MAS), Model 129
15 Not used
16 Circuit 15







X11/4s1 (with LED - California)
1 Ground
2 OBD Pushbutton for on-board diagnostics
3 CFI Continuous fuel injection (CIS-E)
3 DM Diagnostic module
4 LED
5 ASD Automatic locking differential
6 AB Airbag/ETR (SRS)
7 A/C Air conditioning, Model 124
7 RB Roll bar, Model 129
8 DI Distributor ignition
8 HFM-SFI HFM sequential multiport fuel injection/ignition
9 ADS Adaptive damping system
9 RB Roll bar, Model 124
10 RST Roadster soft top, Model 129
10 TN-signal (gasoline)
11 ATA Anti-theft alarm
12 RCL Remote central locking
13 ETC Electronic transmission control
14 EA Electronic accelerator, Model 124
14 CC/SC Cruise control/idle speed control, Model 124
14 ESCM Engine systems control module (MAS), Model 129
15 Not used
16 Circuit 15







16-pole Data Link Connector (X11/22) Model 163
X11/22
1 Not used
2 Not used
3 TNA-signal (gasoline)
4 Circuit 31, Ground
5 Circuit 31 (electronic ground)
6 CAN CAN interior bus (H)
7 ME Motor electronics (ME)
8 Circuit 87, voltage supply
9 ETS Electronic Traction System (ETS), Model 163
10 Not used
11 ETC Electronic transmission control (ETC)
12 AAM All-Activity-Module (AAM)
13 AB Airbag/ETR (SRS)
14 CAN CAN interior bus (L)
15 IC Instrument cluster
16 Circuit 30, voltage supply