Test 18: Convenience Unlock Signal From Transmitter To Passenger Door 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 door control module readings. Point transmitter key at passenger's door handle and unlock vehicle and continue to hold transmitter unlock button. If YES is displayed on HHT, system is okay. If NO is displayed on HHT check transmitter batteries. Transmitter may be defective.