Diagnostic Trouble Code Memory (Section 11)

WARNING: This page is about a different car, the 1996 Mercedes-Benz SL320, 1996 Mercedes-Benz S320, 1996 Mercedes-Benz E320, 1995 Mercedes-Benz S320, and 1994 Mercedes-Benz S320. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: DTC readout using the impulse counter scan tool or via the LED pushbutton switch, has been eliminated. During the DTC readout, the CHECK ENGINE MIL, stays on continuously.

Diagnostic module (OBD II< N59/1) uses 2 different plug connectors for DTC readout:

16-pin OBD II connector (X11/22). See Figure.
38-pin data link connector (X11/4). See Figure.

In case of DTC P0131 and P0133, the exact cause of the fault in oxygen sensor 1 (O2S 1) can be read via MODE 5 with the generic scan tool. To do so, the following codes must be entered in the generic scan tool:

DTC P0131

Code JD 4A HEX

DTC P0133

Code JD 7E HEX