Can I ask with you borrowed €40k for ?
What did you buy with €40k?
In terms of making repayments, if you fail to make repayments the institution which gave you the loan could seek to get a court order against you.
This would mean that your credit rating is immediately affected - you will not be able to access credit from other lenders as well.
My advice would be to try to pay something off that loan.
And speak with your lender, they might be able to make alternative repayment arrangements.