Hello,
the problem is what many people are seeing now: the very high remaining debt combined with the low repayment. Of course, it is clear that the L-Bank offers a great interest rate for the first 10 years but only allows 2% repayment (without special repayment rights). They also want cash flow security and to make money. You still have the option according to the Building Code to terminate the whole thing after 10.5 years, provided the interest rate is below 2% and attractive for you. But we don’t know any of that.
You should really choose an investment form that you don’t touch. Of course, you get more than 0.1% for daily/fixed deposits, but it is human nature to reduce or cut the 500 € savings or spend the saved money recklessly. 500 * 36 months = 18,000 € so then let’s get ourselves a better Audi.
That’s why I always say, 15 years + special repayments and a high repayment rate. Anyone who struggles with 1-2% financing is, in my opinion, negligent.