Here is a list of coolant hose part numbers I've compiled for the 1981-1985 w123 300D, 300CD 300TD 617 diesel models. Includes 1981 N/A and Turbo version with ACCIII climate control. Include some of 1985 California version which has a difference in the Aux pump hoses and I believe monovalve hoses and expansion tank main hose.
Radiator-
Radiator lower: 123 501 18 82
Radiator upper: 123 501 00 82
Expansion tank main hose: 123 501 21 82
Expansion tank secondary hose: bulk hose with 6mm inner diameter and 9 mm outer diameter
Heater hoses (numbers correspond to the numbers on the attached pic.) -
1.) Auxiliary pump to feed pipe: 123 832 94 94........California 1985 version "Z" or "S" hose. Might be unavailable but possible substitute: 201 832 13 94
2.) Auxiliary pump to engine: 123 832 91 94............California 1985 version "J" hose: 123 832 50 93
3.) Heater Core left to feed pipe: 123 832 89 94
4.) Engine to heater feed pipe: 123 832 84 94
5.) Heater core right to feed pipe: 123 832 88 94
6.) Heater core center to feed pipe: 123 832 87 94
7.) Monovalve to feed pipe: 123 832 90 94
8.) Monovalve to auxilary pump feed pipe: 123 832 93 94
(Picture taken from google search)
Any other w123 models, feel free to post the part numbers and corresponding pictures if you have them..
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