some questions about Voygager

Good day first time in the round. Thought times report me here to the group here. Although I have been there for a long time already with different cars in the forum. But currently I have now two cars. Once an Opel calibra bj 96 with 116 ps. And then another Chrysler Voyager with 115 ps 2.5 liters engine Diesel BJ 98. The car is also in very well maintained to stand up to light flue rust on the underfloor so far in very good condition. Couple of small things he has where I l eider not yet know so well. As for example with the speakers of the Amatuiren board is sometimes over so white the in the driver’s door. And since I still have no idea how to change there exactly what. Also the equipment still has some wish open there is missing for the first of the on-board computer and still some lighting in the roof sky then still missing some can holders and since I also have no idea if you can change that so easily. Then I would have there also ask about the m otor. The previous owner said that the engine would have neither chain nor timing belts. But gears that interlocked and so earlier the engine had up to 500,000km guaranteed. Who very intersant whether I could help there who further because still I am unfortunately with the car pulling in new country. So in large and whole the car is in very well maintained condition lots of parts have already been repaired by the previous owner on a specialist workshop plus service. According to information from the predecessor the car was also already ppar years ago at the show on the country. Since I live in Austria it is something different from us in Germany. But who really nice if I could give me some tips or help. Also on the subject underfloor protection vileicht because in the case has nothing at the bottom but so much reason paint.