Dime a Dozen W124 Duo Valve Replacement? 

W202 has the sitronic. I replaced one just 18 months ago. Look identical to yours.

The post facelift w124 have smaller valves too, think the same as the w210, but in the old housing. The valves can be removed from the housing and swapped even if I remember correctly

What setting did you use on the multimeter please? My 86 300d has no hot air so checking this first

I have 1995 220 Ce whit Av 3bottont in the middle Bu i dont got warm air noe where only cold what part nr do i need

What’s the actual operation of these valves? Presumably side to side heating control?

Hi nice video! I have a question my w124 blows cold air only in the center vent and hot air in te sides, is it normal? I have no AC its the 1991 production stock one with dual clime zone

Well sleuthed! What's the 210 part number? The MB part number for the 124 valves is 000 830 65 84, but that's the easy bit. Within this are the two Bosch numbers, 1 147 412 015 (early) and 1 147 412 035 (later). Then there is the Sitronic type 4 950 000 002. (The first Bosch type was prone to catastrophic failure.) Both the second Bosch type and the Sitronic are supported by the rebuild kits. I wonder if this is the case for the 210 valve.