We arrive in MAD @ 06:00 and plan on using the Iberia arrivals lounge for a few hours before heading into the city. But need to know how to access it. The Iberia website is unclear and just says access from the arrivals hall.

I presume this means T4? But is it before or after security? Don’t want to leave and no be able to get back in!

Any info or experience would be much appreciated.

The Arrivals Lounge is after luggage retrieval/Customs and therefore landside/outside security. Since you are heading into the city not sure what you mean about being able to get back in? Arrivals lounges are only available to arriving passengers, not connecting.

It is on floor -1 in the opposite direction from the train station. I never saw any signs until I was right there -- had to ask twice for directions.

Thanks, I shall check that out on Saturday!

"not sure what you mean about being able to get back in? "

When flying out, I found an Iberia lounge in T4 (not T4 S) in the shopping area just after security. Not sure whether I would pass through that way on arrival so I doubt that my boarding pass would get me back in through that security