A1170701475 is marked in the EPC as "control pressure rod". It's loose in my 450 and sometimes detaches from the throttle linkage assembly under the air filter housing. Looking at how it is routed I think it attaches to the transmission on the other end. But what does it do there, or wherever it actually belongs? What pressure does it control?
(http://s3.amazonaws.com/MB450SE/parts/A1170701475_control_pressure_rod.jpg)
It controls the shifting points of your transmission.
From - http://forum.w116.org/mechanicals/%27control-pressure-rod%27/
Quote from: koan on 12 January 2012, 01:47 AM
Don't know what the linkage setup is on diesels but on petrol engines opening the throttle pulls the control rod forwards, suppose with the same basic transmission diesels would be the same.
Adjusting the rod longer so it is pushing further back makes the gearbox see/think the throttle is less open than it really is and will change gears at lower RPMs. Making the rod shorter does the opposite, gearbox sees the throttle more open than it actually is and will change at higher RPMs
EDIT: corrected the above when I realised I had the actions reversed,
koan
The control pressure rod controls at what pressure the transmission shifts. Adjusting it changes the RPMs at which the transmission shifts gears.
Thanks folks. Looks like I've missed this in the search.
--> moved to the original thread: http://forum.w116.org/mechanicals/'control-pressure-rod'