We are flying DL to EZE in May. Traveling business class and wondering about the return check-in back to the US and lounge access at EZE. We depart EZE at 8PM. From what I read on the boards we should arrive about 2 1/2 hours in advance to avoid any delays. Do the business/elite lines help out at all or does everyone get in the same line for security questions before check in.
Is there a business class lounge for Delta BE customers. Last report I read a while ago was that it was being remodeled.

Any information or advice you have would be greatly appreciated. Staying at the Hilton for 7 nights. Always up for some good restaurant suggestions too.
Thanks