Test 12: Lock Signal Verification
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 door control module readings. Point transmitter key at driver's door handle and lock vehicle. If YES is displayed on HHT, system is okay. If NO is displayed on HHT, perform TEST 2: LEFT FRONT DOOR INFRARED (IR) RECEIVER VOLTAGE SUPPLY under SYSTEM TESTS. Transmitter key may not belong to this vehicle.