KE-Jetronic or CIS-E, later versions used an aluminum(silver) distributor with an integrated control valve known as the DPR or Differential Pressure Regulator replacing the WUR. These systems look similar to CIS-M externally, although the computer is less capable. Fuel pressure is controlled by the ECU via the DPR using internal programmed maps, map adjustment for conditions is more traditionally controlled by engine sensors, fuel pressure feedback is not considered. DPR is supposedly grey.
KE3-Jetronic, KE-Motronic or CIS-M (Motronic) - (late 80s to early 90s). These systems look similar to CIS-E externally, running higher system pressures and in the Motronic versions the computer is much more integrated. DPR should be black.
CIS System pressure: 68-78 psi/4.69-5.38 bar (K-Jetronic).
CIS-E System pressure 75-82 psi (Gen.1 KE-Jetronic)
CIS-E Motronic sys. pressure 89-95 psi/6.14-6.55 bar (KE-Motronic or KE3-Jetronic)