Good day New to the Forum

I have Mercedes ML 63 AMG
Vin # 4JGBB7HBOAA557631
It my understanding that there are certain Vin numbers in this engine that have head bolt problems.

How can I make a determination of whether the head bolts have been done previously on this car or is it a vin number where the factory corrected it after they established the knowledge of the problems they were having with the head bolts.
I tried the local Benz dealer with no success.

Could someone much wiser than myself assist me with this ?
email : fortress01@sasktel.net

Thank you in advance

Jerpas