Challenge and GT Cars

Maybe you have already seen this.....
https://www.f-register.com/downloads/ch ... races.xlsx
Very funny to see these results.
My 348 Challenge have raced in 1994 in 1 race and 1995 in 5 races.

In My servicebook you can see :" Service has been done serveral times until 20.000 km as an active racecar - Lais Power"
Written in german on attached foto.
Is anyone have any information about these races in 1994/1995/1996 ?? Any historie would be interesting. Thanks in advance.

Seems like my 348 Challenge was Ulrich Plattenhardt's racecar before his/Lais Power 355.