All,
Yesterday, Matthew James, who is the owner/proprietor of Klima Design Works, stopped by my house for a two-hour visit. Klima is located about 40 minutes from me, here in Maryland. I have some REALLY good news to report.
Klima is making high-quality diaphragm kits for the W123 models, and these are also compatible with the 126 and 124 models. They are making BOTH sizes of diaphragms -- the large ones and the smaller ones. See the photos below. I have several sets of these diaphragms sitting here on my desk.
But MORE importantly, they are also now making the internal assemblies for the two-stage pods. These are exact copies of the factory design, with internal spring and diaphragms pre-installed. You just have to carefully open the pod, and drop in the dual-stage setup. AMAZING.

But there is even MORE good news. Klima is in the final stages of prototyping full pods. Right now these are for the 123/126, but may extend to the 124 in the future as well. Here are photos of the pod housings. It is an improved design that combines the two halves of the pod with screws, rather than breakable clips. The pod housings are done with nylon, and are 3D printed.

But wait .... one last thing: for 126 owners, Klima is also making the monovalve housings that eliminate the pesky and NLA Bosch monovalve insert, and employ an improved design that uses a modern electric motor. As you can see from the photo below, duo-valve systems (for Yurro 126 models with dual-zone climate control) are also available.
Single-zone heater valve (monovalve) housing (typical for US 126 models with ACC):

Dual-zone heater valve housing:

For you 123, 201, 124 and 126 nerds, who love to geek out ... there is even ONE MORE THING for you. Let me ask you this -- do you know what the MB part number is for the MALE connector that goes into pin bushing housings? Not the female piece -- these are well documented. I'm talking about the MALE piece that slides into these female aluminum pin bushings (see below photo for the FEMALE pin bushing). These FEMALE units are MB part number 002 545 99 26.

@Klink? @gsxr? @jhodg5ck?
Nope, I didn't think you'd know the part number for it. It's not documented anywhere in MB parts catalogs ... or if it is, it is very esoterically located. I've never seen it....
Well, Klima is also making and selling these pins that make up the connectors. They're exceedingly high quality, made out of nickel. Here's what they look like.

Klima has an amazing array of interesting stuff. Their web site is Klima Design Works – Climate Control Upgrades for Vintage Mercedes
If you want to contact Matthew, you can reach him at sales@klimakit.com
Yesterday, Matthew James, who is the owner/proprietor of Klima Design Works, stopped by my house for a two-hour visit. Klima is located about 40 minutes from me, here in Maryland. I have some REALLY good news to report.
Klima is making high-quality diaphragm kits for the W123 models, and these are also compatible with the 126 and 124 models. They are making BOTH sizes of diaphragms -- the large ones and the smaller ones. See the photos below. I have several sets of these diaphragms sitting here on my desk.
But MORE importantly, they are also now making the internal assemblies for the two-stage pods. These are exact copies of the factory design, with internal spring and diaphragms pre-installed. You just have to carefully open the pod, and drop in the dual-stage setup. AMAZING.



But there is even MORE good news. Klima is in the final stages of prototyping full pods. Right now these are for the 123/126, but may extend to the 124 in the future as well. Here are photos of the pod housings. It is an improved design that combines the two halves of the pod with screws, rather than breakable clips. The pod housings are done with nylon, and are 3D printed.









But wait .... one last thing: for 126 owners, Klima is also making the monovalve housings that eliminate the pesky and NLA Bosch monovalve insert, and employ an improved design that uses a modern electric motor. As you can see from the photo below, duo-valve systems (for Yurro 126 models with dual-zone climate control) are also available.
Single-zone heater valve (monovalve) housing (typical for US 126 models with ACC):





Dual-zone heater valve housing:




For you 123, 201, 124 and 126 nerds, who love to geek out ... there is even ONE MORE THING for you. Let me ask you this -- do you know what the MB part number is for the MALE connector that goes into pin bushing housings? Not the female piece -- these are well documented. I'm talking about the MALE piece that slides into these female aluminum pin bushings (see below photo for the FEMALE pin bushing). These FEMALE units are MB part number 002 545 99 26.


@Klink? @gsxr? @jhodg5ck?
Nope, I didn't think you'd know the part number for it. It's not documented anywhere in MB parts catalogs ... or if it is, it is very esoterically located. I've never seen it....
Well, Klima is also making and selling these pins that make up the connectors. They're exceedingly high quality, made out of nickel. Here's what they look like.


Klima has an amazing array of interesting stuff. Their web site is Klima Design Works – Climate Control Upgrades for Vintage Mercedes
If you want to contact Matthew, you can reach him at sales@klimakit.com