Which liquids change SLK200 R170

Hello dear SKL friends. I am now owner of a SKL 200, K170, automatic, BJ. 1999, 227000 KM, 136 HP, TÜV new. TÜV report: GM: dust sleeve left and right damaged. Notes: light corrosion transverse beams, rear tyres older than 10 years, front tire ageing cracks, silencer slightly corrosion It stood about 1 1⁄2 to 2 years at the dealer on the yard. The dealer has installed a new air conditioning system, new fenders and a new petrol pump. The roof opening lasts from the beginning of the window opening to the end of the window closing 28 sec.. I paid 220€ for it. There is probably no real workshop history. What do you think I should do, or have it done? 1. OIL EXCHANGE 2nd CUSTOMS EXCHANGE 3rd ACCOUNTS 4th ACCOUNTS 5th Automatic gearbox flush? Or just swap it? Or does it last forever? 6th Dust Mansc 7. What do you think you’re doing? Or what do I not have to do? I would be grateful for useful tips.