Check Engine Light

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2002 Mercedes-Benz SL600, 2001 Mercedes-Benz SL600, 2000 Mercedes-Benz SL600, 1999 Mercedes-Benz SL600, and 1998 Mercedes-Benz SL600. However, it is still accessible from the selected car via links, so may be relevant.

Both left cylinder bank ME-SFI control module (N3/11) and right cylinder bank ME-SFI control module (N3/12) are equipped with Diagnostic Trouble Code (DTC) memory. All faults are read out through the right cylinder bank ME-SFI control module (N3/12). Malfunctions are stored as constantly present or intermittent (occurred during a trip). DTC memory is retained when battery is disconnected. Malfunctions which are no longer present are erased as follows: after 3 trips CHECK ENGINE light goes out and after an additional 40 warm-up periods, DTC is automatically erased.

A warm-up period is defined as engine coolant temperature less than 95°F (35°C) at engine start with engine coolant temperature increasing to more than 176°F (80°C). A trip is defined as follows:

Engine running for more than 20 minutes
Engine oil temperature more than 19°F (-7°C)
Engine speed more than 500 RPM
All functional chains were checked during previous trips

CHECK ENGINE light will flash if a misfire event occurs. A misfire event would involve fault codes P0300 through P0312. For any other faults, CHECK ENGINE light will illuminate permanently.