You have it backwords actually. The falling value of the dollar is to our benefit, and that's why much of Europe is complaining that the US govt isn't stopping it.
When the value (aka: buying power) of our dollar drops, imports become more expensive and thus decrease, exports become cheaper to other countries and thus increase, our debt burden is smaller, etc. We have a trade imbalance atm, but a falling dollar works to fix that by reducing our imports and increasing our exports. If the buying power of the dollar were to increase, imports would increase, exports would decrease because the relative cost was higher, and our debt burden would grow because that $10 you owe someone overseas is now worth more.
Let's say I borrow $100 from a friend in England. Then the value of the dollar dropps to half what it use to. I can then pay him back at half the value it initially cost me. Same thing for the national debt that is overseas.
The only problem at the moment is China is going out of its way to keep its money pegged at the same value of our dollar. Thus, it prevents those benefits and corrective actions from going into effect.
You speak of Germany, but the key difference here is the reason their currency dropped in value. It dropped because the government was mass printing money. Inflation was around 50%, per day. People had to go out on their lunch breaks and spend their money as soon as they got it, otherwise it couldn't buy anything by the time they got off work. That isn't going to happen here since the government isn't mass printing new money on the scale Germany was.
