Look these email that I got today from miles&more :
Dear Mr XXXX XXXXX
Thank you for your e-mail.
We are delighted to see that you used your accumulated miles for and upgrade on your flight Frankfurt - Mexico City on 27 January. As you will be flying Business class from Zurich to Frankfurt we ask that you use the Business class check-in. Unfortunately, you will not be granted access to the first class lounge in Zurich.
When you arrive in Frankfurt we invite you to visit the First Class lounge as you will have a First Class ticket to Mexico City. We hope you enjoy your flight.
Please feel free to contact us again if you have any queries. We will be happy to assist you.
Sincerely,
Your Miles & More Service Team
So, many information here is wrong or what ?
NewbieRunner : What do you think ? is a new rule even I upgrade my ticket from Business to First ? I can not find any information. Maybe someone from these forum know something.
Any reply ?