[ASnep]

When ARD and ZDF launched their Digital Satellite offerings in 1997, they offered a MHEG-based Red Button service, which offered a selection of content from their respective websites and teletext, plus an expanded program guide. Due to the low use of the service in recent years, it was deactivated with the launch of HbbTV, although Videotext (ARD-Text/ZDFtext), either in analog or HbbTV mode, is still available on the DSAT services.

web.ard.de 

Those weren't MHEG based, but rather used "OpenTV" and from 2004 to 2007ish MHP.