Service Precautions

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2002 Mercedes-Benz ML320, 2002 Mercedes-Benz E320, 2002 Mercedes-Benz CLK320, 2001 Mercedes-Benz ML320, and 2001 Mercedes-Benz E320. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: DO NOT perform testing or repair procedures on ignition system if you have a heart pacemaker.

Turn ignition off before connecting or disconnecting ME-SFI control module connectors.
DO NOT ground ignition coil terminal No. 1 (of any ignition coil) as a theft deterrent.
When cranking or idling engine, DO NOT disconnect ignition coil cable or spark plug cable.
Ignition system high output side must carry at least 2 k-ohms of load.
Turn ignition off when connecting or disconnecting test equipment at ignition coil.
DO NOT connect a test light to ignition coil circuit No. 1 or 15.
When performing an ignition spark test, check one spark plug at a time and ensure spark plug is grounded.
When performing compression test, ensure ignition system is disabled. Additionally disconnect ME-SFI control module connector No. 2.