[Off-topic] SciFiSurfer:
I like what I've been reading in the responses you've gotten up-thread of this one from me, but I'd like to offer a different perspective on this situation. In part, I will be echoing souljaboy's comments.

In any professional environment, you need to do deep research on every company you either are working for or which is a potential suitor. To fail to do this is both foolish and dangerous. What I mean about "deep research" incorporates a number of things. First, you need to see how their stock (whether publicly or privately held) is doing, and what its performance has been over its history. Remember, context isn't "everything", it is the "only thing".

Second, you need to look into what their customers in total have been saying about them, along with vendors and anyone else you can find out about (Google is thy friend, but so are contacts and social networks). When a company -- especially an American company -- makes any claim to stability, it's not so much that you should be skeptical, but you need to remember we in America are short-sighted, and so a "long term" plan means maybe a year or two (at best, if you're lucky).

The fact that Company B has a 60 year track record is nothing to sneeze at, so that's a good start, but you need to know more.

Third, you need to learn something of the inside politics of the company. How long have the BoD been there? Who are they? What do people (stockholders, others in the industry, etc.) say about them? Remember that companies are just like fish: the rot starts at the head. A company can "look" alright but may have decaying leadership and other issues which seriously jeopardize its future viability. Don't be too easily deceived.

Ok, apart from fully investigating Company B, let's take a look at Company A.

It's a German company, which means that it's based in a member country of the European Union, and it also means its future is tied to such things as the value of the Euro, the EU member bail-outs (think Greece, for instance) and then step back and realize that all of these basically "political" factors may have long-term effects. Also remember that the EU, the U.N., and others are discussing changing the global currency backing from the U.S. Dollar to something else, and this is liable to have a sharply negative impact on U.S. <> German economic interactions.

Because Company A is a member of the automotive industry, you need to look long and hard at what's going on in other, seemingly-unrelated areas like oil, wind/solar/battery, etc. Even a stable company that's made no mistakes on its own can crumble if the rug is pulled out from underneath it harshly enough.

Also, you need to ask yourself a question: What are the fundamental reasons (this list should not exceed two or three items) that company set up U.S. operations to begin with? Then, ask yourself: if the U.S. economy (or the German economy) went to hell, or if things like tax rates for foreign companies, or import duties, were to go up significantly, at what point would your U.S. operation no longer remain viable? Then, lastly, ask yourself where things are presently in relation to that upper cut-off.

While it obviously pays to not be tin-foil hat conspiracy-theorist on this, it also pays to remember the Titanic and Britannic were "unsinkable" too.

Good luck to you, whatever you may decide.