First aid material in the car

Hello, I have a question about the first-aid kit, which must be on board every vehicle. I myself have a training as a paramedic and also offer the medical service in addition to other services in the security service commercially. For this I have put together a suitcase, which is built on the first-aid kit according to DIN 13157 (trade) (of some associations are more there, of others less) and has been extended by useful material. offer e.g. a blood pressure measuring device, a breathing bag (combibag from Weinmann), a blood glucose meter, pulse oximeter, a few splints, a Stifneck and a lot more. In the case everything you need for the first-aid is compiled according to my own experience. Now the police stopped me the other day. The gentlemen wanted to see the first-aid kit and the warning triangle among other things. The first-aid kit of the car was half empty with me because I used the things And the gentlemen did not want to recognize the suitcase as a first-aid kit. Also my reference to the §35h Abs. 4, StVZO ignored the police. After that also other first-aid material can be carried along. One of the policemen then told me that he would deal with e.g. a first-aid kit. In my suitcase he doesn’t know now, however, where there is something. (Right at this moment I thought of the joke with the doctor and the bun!) En The story was a defect card and an oral warning. Oh yes, and the things I put out of the first-aid kit, I was not allowed to put back in my first-aid kit. I wonder, however, if that is so right. I actually have tested material in the suitcase, with which you can provide first-aid, in the total value of about 600€ and that is not supposed to meet the requirements of a first-aid kit of 0815 €??