Translation:
2. information for quick access
Paragraph 5 para 1 no 2 TMG says literally:
"Information to enable a fast electronic contact and direct communication with them, including electronic mail address."
You can hardly more clear than that. And if Google answers:
Google will not respond to or even read your message
it definitely breaks the law, since this is not even a one sided communication.
The problem here is that the law *requires* an email address. It was never really thought out for large companies with billions of customers, and the law is effectively a bad law as a result, but it is still in fact the law.
I can imagine that the response is going to be something like an IVR system, where you are emailed back something which requires you provide more context ("or you can click here"), and repeats the process narrowing down the context, each time ("or you can go here"), until it drills down to the automated system where it can bucket it into the appropriate web form you should have used in the first place instead of sending them an email, or your problem is answered, or you give up and go away.
Unless there's also a law against IVR in Germany?
Guaranteed that most of these emails to that address are SPAM and/or people bitching about seeing things in the search results they don't want to, or not seeing things in the search results that they expected to, and a human would be telling them, very politely, that nothing will be done about their complaint and/or they are not interested in pretending to be the heir to the fortune on deposit in the Bank of Lagos by the wife of the late oil minister ("now deceased, God Bless").