MACR 9642 has included the German crash report J2203 (see
http://www.fold3.com/image/38219164/), that gives the crash location as on the road Schmidt-Kummerscheid.
The document included in the MACR is a translation and I believe the second place to be Kommerscheidt, 1 mile NW of Schmidt.
The location is roughly 30-40 km WNW from Bad Munstereifel, but the loss location given in the MACRs were often wrong by more than this distance. German crash reports are more reliable.