The "Gebirgsbahn" and the "Grand Canyon Bahn" were both destroyed by a fire in 2001. Heres what caosterfoce.com wrote (actually it isnt a bobsled-coaster!):
At Phantasialand Park in Germany, 63 people were injured when a fire broke out on the Grand Canyon Bobsled Rollercoaster. 150 people were riding the coaster and an adjacent ride at the time the fire started, which quickly spread to buildings forcing the park's guests to flee for safety. Some people jumped off the ride whilst others escaped by ladders. Over 600 people who were standing in line were also forced to evacuate as flaming wood flew across the park covering an area nearly 300ft away. Eyewitnesses were terrified that huge burning structures would fall on them. In all, nearly 20 000 guests were affected by the blaze. The cause of the accident, is now known to be a short-circuit resulting from faulty wiring.
The full name of that other coaster is "Colorado Adventure - The Michael Jackson Thrill Ride".