Update, Well I have heard from Mercedes warranty in Canada as mention above so I contacted my dealer, Keeler Mercedes on 12-29-22 and told them about the phone call from Mercedes warranty of Canada and they said it will take a while to find out. Called the dealer on 1-27-23 and they told me they were having trouble getting approval, I gave them the name and number of who called me from the warranty dept. Called again on 2-9-23 and was told flat out that it cannot be done in the US, would have to take it to Canada to have the work done and received an email from the dealer stating so. I forwarded this email to the Canadian Mercedes warranty department.
Received a call 2-10-23 and the Canadian warranty dept said this could be done in the US and they would get to the bottom of this with the dealer and the US Mercedes warranty dept!
Were keeping our fingers crossed, will keep you updated!