Short; Once committed to opening the dash, rebuild everything underneath.
After many searches and pouring over websites, I cannot find a guide to rebuilding a 300SD, (1983) dash, vents, heater, blower, mono-vavle, vacuum actuators in one concise place. Just bits and pieces. Even Kent (The Guy) doesn't have a Guide...yet... Help?
Thanks to this forum and Kent's ...Source, The engine and turbo are great and the tranny shifts like a ....well, Benz!
So on to Creature Comforts (the Girl wants heat....)
Removing the dash and rebuilding everything underneath is the general goal.
Once I'm into an area, I like to spend lots of Zen Time and fix everything in the area and clean/refinish as I go.....
my own situation: '83 and 82 300sd:
The vacuum line from the engine pump shows a leak.
The EC Control seems to be conscious and working, but no doors move.
The front vents, center left and right do NOTHING as far as airflow goes.
Heater blows only slightly warm air , and not in any specific direction.
So I think taking it ALL apart and giving it the replace/rebuild/refinish/polish everything treatment should get it all working again.
The AC...well, THAT's another Story and is Out of Scope, me thinks, in this Thread.
With your collective Input, this thread might grow into a sectioned Heater and Vents Restoration Guide:
Section #1: Remove Glove Box - don't you hate a crooked Glove Box!?
Glove Box Removal: Gets you into the vent section of the dash. not tested or photographed yet
1) Pry glove box light out and disconnect wire.
2) Gently pry upper half of the plastic rivet to release it.
3) Remove the lower half of that rivet.
4) Remove glove box. (installation is reversed)
2) Remove Center Console - fragile plastic does NOT like guessing here.
3) Remove Dash - going ON is tougher than getting it off?
4) Rebuild MonoValve
4.5) Flush Heater Core
5) Rebuild Bower with brushes and bearings.
6) Test Vacuum Actuators and replace
7) replace all Vac hoses
8)Good air flow to passenger doors through the permeable leather (true Benz)
9) Rear Passenger Heat and controls
10) test before reassembly
Much Thanks in keeping our 'Ol Ladies beautiful!
"Rear passenger heat" are the floor ducts under the front seats. Some think the fresh air vents at the rear of the console transfer heat. They only send outside air, so shut those during cold weather.
Programa Main Page.
ProgRama Remanufactured Electronic Control Modules 2-3 YEAR warranty
W126 CCU Page.
Professionally remanufactured parts with extended warranty
Rebuild all of the vacuum pods even if they hold a vacuum. Cheap insurance while everything is apart. Purchase the rebuild kits and special tool to rebuild them from George Murphy at Performance Analysis Co. Phone number see thread
sealing foam on all the doors/flaps. Possibly Oven Door Sealing like Grainger Item # 21VM85? What diameter?
MORE TO COME!! 20Jan2015