Pulling blink codes (pre-OBD-II)
Procedure for reading the diagnostic blink codes from the X11 connector under the hood.
M117.967 uses a single-pin diagnostic socket (X11). With the key in position 2, ground the socket through an LED tester; codes appear as flashes (1–9 short pulses, separated by long pauses).
What the diagnosis checks
- Have you got a Mercedes blink-code reader (or LED + 22 Ω resistor)?
- Did you press the button for ≥ 2 s with key on, engine off?
Possible causes it points to
- Read and decode the codes
- Reader procedure / no codes returned
- Build a simple LED tester
Parts for this job
KE-Jetronic fuel system sparesLoading the step-by-step diagnosis…