Disco

Diso was a pop music program that aired in Germany on the ZDF network from 1971 to 1982. It generally aired on the first Saturday of each month at 7:30PM, each show running 45 minutes. 133 shows were produced. The show was hosted by German actor and comedian Ilja Richter.
The show focussed on chart hits current at the time of airing, giving about equal airtime to international pop music and German Schlager. Despite its name, it did not particularly focus on disco music although it featured many disco hits as long as they were chart relevant. (The name of the show was devised before disco as a musical style existed).

Episode 63

ABBA are subjected to one of the most humiliating TV appearances ever by being made to march around the TV studio with the host and other guests clapping as they go. 

Björn and Agnetha come across as embarrassed while Benny and Frida get into the spirit of it and have a laugh, especially as they walk 'as one' with John Richardson, drummer from The Rubettes..  At one point when they think the worst is over, they stop and then have to sway backwards and forwards. The host grabs one of Agnetha's arms and Björn grabs the other and she is pulled in both directions with her arms nearly pulled out of their sockets!  All she can do is laugh.  There's one more march around the studio before they are allowed onto the stage for their performance of "Mamma Mia" when they regain all their dignity.  Apparently this show was broadcast during the German "Carnival Season" hence the whole clapping/shlager thing.  The song being sung as they marched around the studio was sung by German singer Tony Marshall and was "Vom Hofbräuhaus zur Reeperbahn".

During the opening credits you had short look into Agnetha's dressing room and being made up.  In fact you can see in the background some moving footage of the rehearsal performance of Mamma Mia.  You see a brief camera pan of the mixing desk with several TV monitors on the wall.  In one of the TV monitors, you can see Frida wearing a scarf over her head.

The programme was hosted as always by Ilja Richter.  Other guests on the show:

1. Bay City Rollers - "Money Honey "
2. Costa Cordalis - "Shangri-la "
3. Rubettes - "Little Darling"
4. Tony Marshall - "Vom Hofbräuhaus zur Reeperbahn"
5. Leo Sayer - "Let it be "
6. Bernd Clüver - "Ein fremdes Mädchen "
7. ABBA - "Mamma Mia"