You don't know german cable companies
German cable companies are evil. They usually don't take any responsibility. In most cases, if you have a technical problem, they either tell you to "go to your landlord" or they just stop talking to you.
At least the largest one of them works on old equipment which is slowly crumbling appart. It's not unusual that whenever there is a light rain shower at the downlink station, the picture goes away, beeing replaced by a nice FUBK test-pattern labelled "Deutsche Bundespost". (that's the pre 1995 name of the cable operator back then) I've seen cases where there was constant FM-sparks in certain easy to recieve television stations for months, but they just didn't bother to fix their equipment.
Now this is at least a small victory for the consumer. A court has decided that the cable operators need to maintain their networks.