Did you completely ignore that wonderful section I included on corporate culture? You know, the one where I said that the present emphasis German firms have on advanced manufacturing techniques and extremely high quality evolved as a direct result of the post-war economic process?
I'm guessing you did. So let's try again. Without WWII, there's none of the anger felt IOTL among consumers in France, the UK, or the US about Germany. They have no disinclination to "buy German," so to speak. That public relations problem was what drove the Germans IOTL to develop an emphasis on quality and efficiency, and that emphasis means that it's absolutely necessary to completely overhaul your capital plant every few years. I'd say at least once or twice a decade. So where American or British firms IOTL will buy new capital goods when necessary, German ones buy them on a regular schedule and design them so that they can be paid off inside that time frame. This enables them to continually access the latest and best capital goods. It also, ironically, slightly lowers their short- and medium-term profit margins, which is why most firms don't do it. Where it shines is in the long run, when their reputation for quality and fine tolerances keep repeat customers coming back even though the goods are more expensive.
Now, we take away WWII. Not only does Germany not get the shot in the arm given to it IOTL by the United States; it also has no need to develop the corporate culture that has kept its capital base so up to date over the last six decades. German firms ITTL, without either of those impetuses, will behave in much the manner that American, British, Canadian, or French firms do IOTL. It's capital plant, therefore, will look much less like it does IOTL and much more like America's does IOTL. It's education system will still have that technical bent, and it's engineers will be good. But the corporate culture that supports them with state-of-the-art capital goods and factories will never come to exist. So TTL will not see the near-constant updating and upgrading that OTL does. Germany's economy will look much more mixed, rather than having the focus on industry and manufacturing that was given to it by WWII. Follow my logic?