Specifications

9
Operations Connecting to a Vehicle
Figure 3-5 16-pin OBD-I connector—fits MB-2 adapter
US Models California Models Only (With LED)
Pin Function Pin Function
1 Ground 1 Ground
2 Not used 2 Push-button for on-board diagnostics
3 Continuous fuel injection
3
Continuous fuel injection
4 Electronic diesel system Diagnostic module
5 4MATIC 4 LED
6 Airbag/ETR (SRS) 5 Automatic locking differential
7
Air conditioning (model 124) 6 Airbag/ETR (SRS)
Roll bar (model 129)
7
Air conditioning (model 124)
8
Distributor ignition Roll bar (model 129)
HFM sequential multiport fuel injection/
ignition
8
Distributor ignition
Pressurized engine control
HFM sequential multiport fuel injection/
ignition
9
Adaptive damping system
9
Adaptive damping system
Roll bar (model 124) Roll bar (model 124)
10 TN-signal (gasoline)
10
Roadster soft top (model 129)
11 Anti-theft alarm TN-signal (gasoline)
12 Remote central locking 11 Anti-theft alarm
13 Electronic transmission control 12 Remote central locking
14
Electronic accelerator (model 124) 13 Electronic transmission control
Cruise control/idle speed control
(model 124)
14
Electronic accelerator (model 124)
Engine systems control module (MAS)
(model 129)
Cruise control/idle speed control
(model 124)
15 Not used
Engine systems control module (MAS)
(model 129)
16 Circuit 15
15 Not used
16 Circuit 15