Cylinder Selective Fuel Shutoff
WARNING: This page is about a different car, the 1992 Mercedes-Benz 400E. However, it is still accessible from the selected car via links, so may be relevant.
Ignition interruptions are recognized through monitoring of primary ignition circuit voltage and duration. If an interruption is detected, fuel injector for affected cylinder is turned off. If ignition interruption is no longer detected, fuel injector is turned back on if engine speed exceeded 2480 RPM and throttle valve is almost closed.