Test 4: Electronic Ignition Lock Control Module
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 1999 Mercedes-Benz E430, 1999 Mercedes-Benz E320, 1999 Mercedes-Benz E300, 1999 Mercedes-Benz CLK430, and 1999 Mercedes-Benz CLK320. However, it is still accessible from the selected car via links, so may be relevant.
Connect Hand-Held Tester (HHT) to Data Link Connector (DLC) located in engine bay. Monitor electronic ignition lock control module readings. Turn ignition switch to first position, ON will be displayed on HHT. Turn ignition switch OFF, OFF will be displayed on HHT. If readings are not as described, replace electronic ignition lock control module.