Apex domains cannot have CNAME records.
Question and response
Question
dig mediamarktsaturn.com. NS
Answer
mediamarktsaturn.com. 5 NS a9-67.akam.net.
mediamarktsaturn.com. 5 NS a18-64.akam.net.
mediamarktsaturn.com. 5 NS a10-67.akam.net.
mediamarktsaturn.com. 5 NS a5-66.akam.net.
mediamarktsaturn.com. 5 NS a4-65.akam.net.
mediamarktsaturn.com. 5 NS a1-250.akam.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0