Reading Diagnostic Trouble Codes

When using the scan tool
Connect the scan tool to the data link connector, and then read the diagnostic trouble codes.

Caution
(1) Turn the ignition switch off before connecting or disconnecting the scan tool.
(2) Use the special tools (MB991544 and MB991545) to connect the scan tool as illustrated.




If scan tool not available
1. Cycle the ignition key On - Off - On - Off - On within 5 seconds.
2. Count the number of times the check engine/malfunction indicator lamp on the instrument panel flashes on and off. The number of flashes represents the trouble code. There is a slight pause between the flashes to separate the first and second digits of the code. Longer pauses between flashes separate individual trouble codes.