Which years are mechanically controlled?

2.5L ALL

2.9L Bosch VE rotary version....electronic

.

__________________
w126 500SEC gen II euro, powered by OM617 turbo stolen from 84 300SD 2.88 diff,EGR blinded
next wish/project: w114 coupe OM603 powered

IP? All US passenger car models are basically mechanical with electronic idle control.

Wastegate? 90-93 have ECU control via vacuum, easily replaced with ungoverned boost actuator. Don't know about '87 190D turbo.

Sixto
MB-less

Do any year 602 engines have a mechanical idle control?

I think my 84 601 does.

__________________
Strelnik
Invest in America: Buy a Congressman!

1950 170SD
1951 Citroen 11BN
1953 Citroen 11BNF limo
1953 220a project
1959 180D
1960 190D
1960 Borgward Isabella TS 2dr
1983 240D daily driver
1983 380SL
1990 350SDL daily driver alt
3 x Citroen DS21M, down from 5
3 x Citroen 2CV, down from 6

'84 OM601 does have PLA (pneumatic idle-speed control).

The OM602 "euro" NA-engines (602.91, 250 D/250 TD/190 D 2.5) does have PLA. But "euro" models with "automatic + A/C" does have ELR (electronic idle-speed control).

602 = none of the US models. There's a mechanical base idle setting that can be raised if ELR fails... which is about never.

IIRC '84 601 has an idle up funciton when the AC compressor is engaged, not the stabilizing function ELR provides.

Are you looking for an IP to survive a solar flare or something that won't strand you? A 602 won't strand you if the electronics fail. You might not even notice if you swap in a pressure wastegate actuator.

Sixto
MB-less