Finally decided a couple weeks ago to bite the bullet and replace the crusty old reservoir in my wagon. What finally arrived after I was informed that the old p/n, 124 869 06 20, had changed, along with the price of course, was 124 869 09 20, which turns out to be the reservoir that's installed in the 124.128. I was initially summat disappointed but decided to give it a closer look. The new reservoir is longer and thinner than the original and if it was to fit it was clear that the overboost protection switch would have to be displaced. With that out of the way though the new res dropped right into the original bracket affording a lot better view of and access to engine compartment components on that side. It was a simple matter to take a piece of small steel bar stock & drill 3 equally spaced holes, mounting the result so as to move the overboost switch forward by precisely the distance between the bracket mounting points or about 1.75". I was never really all that satisfied with the amount of real estate the old res occupied so I'm pretty well pleased with the result. The only other thing I had to do to complete the connection was to massage the brittle old cable harness with a bit of fairly gently heat to render the necessary portions pliable enough for long enough to adapt to their new positions. The harness may not be long enough to allow for direct connection to the headlamp washer motor on the engine side of the res, but that's not an issue on my ride as that hole's been plugged.
If anybody finds a need for one of these, don't neglect to order a new lid to go along with it. Mine's sealed with a few layers of plastic wrap secured with a rubber band until I can lay my hands on the much larger correct lid. joe
