Radio Regional Heilbronn was a local radio station that came on the air in November 1987. We heard them while traveling through the area in May 1989. They responded to my reception report with this QSL.
Today the 100.1 MHz channel in Langenburg is occupied with Antenne 1 and the 103.2 MHz outlet in Hielbronn is being used by Radio Ton Heilbronn/Franken.
REFERENCE: http://www.lfk.de/programme/radio-programme/region_stuttgart.html (Accessed 14 August 2015)