Pretty stupid. You are signing paper that claims you never left Germany!!!
You are opening up yourself to personal German tax residency, with all pleasures it brings. Payable 10 years back!
And do not believe that 185 days bs. Correctly losing tax residency in state like Germany, Denmark, Norway or Australia is very difficult. You can not keep any assets like company or house there!
Edit: why downvotes? Many states only require 90 days or less to become tax resident. Australia is fine with a house. Norway will tax your income for 3 years after leaving!
Claiming you manage holding company within Germany, is a huge red flag!!!