HUK-Coburg Protection letter and/or ADAC membership

Hello, I have completed my car insurance at the HUK-Coburg in February, including a protection letter for 6 euros per year. Next month I go on holiday, 700km a route. Even if my car is in perfect condition, one wonders, of course, what services can be expected from the insurance in the event of a breakdown, there can always be some technical defect. I have got a booklet, in which all services are listed, but However, I would like to ask again, especially because it is sometimes rather opaque, which is now exactly covered. Is it worth it, in addition to the protection letter, to conclude an ADAC membership, because for example the one or other relevant service is not covered in the protection letter or can I save the membership fee? Are only 19 euros, but if the services are completely identical, you do not have to throw the money out of the window. The most important thing is what I can expect exactly if I can no longer drive half way due to a technical defect. Does the vehicle have to be towed to the place of residence or can I specify another place? I have a friendly car mechanic at my holiday destination, in which I want to park the car in case of an emergency. Wouldn’t it be nonsense if my car is towed to my home, although we are just on our way to the n holidays were, then everything falls into the water. I and my passenger should of course also somehow arrive at the holiday place. LG and thank you very much! 🙂