Just been reading that site and WOW, I'm glad I kept it on track...see this!
Optional extras available at additional cost include armco repairs, safety car attendance, vehicle recovery, track closure, hospital stays and helicopter rides. I recommend avoiding these. If you can't, then the following price-list may help:
* Removing damaged armco: €10/metre (x2 or x3 or x4 for multiple-height sections)
* Replacement armco: €31/metre (x2 or x3 for double/triple height)
* Removing damaged armco posts: €5.10 each
* Replacing armco post: €39 each
* Safety car attendance: €82 per 30 mins (car + 2 people)
* Circuit closure: €1,350 per hour
* Recovery truck: €175 (inc VAT)
* Hospital stay & air ambulance: Let's just say, do NOT go there without travel insurance! (Though an E111 may cover the hospital bit.)
Everything except the recovery truck is then subject to 16% VAT.
The record armco bill I'm aware of is €15,000. That was a car that managed to flatten a very impressive length of armco between the Quiddlebacher Hohe bridge and the crest on the approach to Flugplatz. But even a minor bump can turn into a surprisingly expensive day out.
The track was closed for at least 15 mins due to an accident when I got there. Their bent car was recovered to near where I'd parked. No wonder the guys looked a little disconsolate...