Supplement to the certificate of approval

The seller was with me at the registration office and when I had already registered the car there was suddenly a side sheet with the registration certificate. There was also no TÜV report. The seller also said that you don’t need it and it is sufficient when it is in the old vehicle license. Didn’t believe that and he then decided to buy a car that I bought a car that was lower and I didn’t notice it before. After that, there was money against papers and keys. There’s also a no. Can you find out what exactly was installed there? Looks like a suspension spring somehow. On the first page there are a lot of tires and rim sizes first. Then come some things I can’t do much with. ET 55MM*FZ W.MIT ZZBL GEM.ECE-R48-01 AUSGERUEST*M. VEHICLES FEDER N, HERBST. : H&S, KENNZ. V . : 29879VA, H.: 29879HA, FAR-BEIBLATT- On the side sheet it says: BE:ROT, DABEI*ZU 20:-30MM* (LT.DEKRA, UB.-NR. :00069475667 V8 OF 14.03.02) What exactly does that mean?