I have a 2011 B 40 C and the gas cylinders seems to be outworn. Anybody knows if they are adjustable (hidden mount) or do I have to buy new hinges at 8-900 euro a piece? https://drive.google.com/open?id=0B0MMeaUeoAiIM2x1dXRYTkNIUm8 (http://picture%20here)
I can't imagine that they'd be adjustable, but you should be able to source replacement gas struts at a more reasonable price. The existing struts will probably have a rating printed on them.