EFI is simply a generic term for fuel injection and does not describe a particular system.

The earliest Bosch systems were D-Jetronic followed pretty much simultaneously by K-Jetronic (CIS) and L-Jetronic.

The advantage seen at the time by Mercedes in using K-Jetronic is that the car will still run following failure of system electronic components.

Nevertheless, L-Jetronic is the survivor, and nothing is fitted with anything else these days.

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Kent Christensen
Albuquerque
'07 GL320CDI, '10 CL550. '01 Porsche Boxster
Two BMW motorcycles