The EHA is Electrohydraulic actuator. It is mounted on the left side of the fuel distributor.
The engine manual for the M116.96 & M117.96 (560) covers the CIS injection system fair. They don't tell you about nozzle holders and vacuum system on the fuel injection. I think the CD just covers the W126 chassis ?
H. O. Tyler
90 560 SEL
85 300 SD
83 240 D