1988 Mercedes Benz 300CE (124 Chassis) Connecting Test Equipment and Reading Diagnostic Trouble Codes
Testing with the impulse counter should be carried out for rapid fault diagnosis. The
impulse counter output shows only existing faults, since the ACC system does not have
memory capabilities. If one or more faults are indicated, repair as necessary and repeat
the test. Be sure that fuse #7 is good, the battery voltage is between 11-14 volts [...]
