230GE – some problems – power loss, high consumption, slip through when gear changes

Dear G-meinde, I have finally fulfilled my dream and bought me a G-Class. At the beginning it was allowed to be the small 230er. Since the car has some problems, I have here a bit through the forum and think to be able to estimate some already already. Since here some members are really very well informed, I hope one of you lovers can give me a comment with to the one or another on the way. Point 1: The G consumes m.E. after too much, in the city over 2 If you don’t switch on the mountain, the car will even slow down. (Kickdown button probably also defective) Could the Lamba probe be?! Have read something from the emergency run program and the properties would fit the described problem. I will check candles, oils, air filters, LMM, distribution cap and jet force separately. Anyone else an idea? Point 2: The automatic transmission is basically good and fast, but when changing gear 3 to 4 the whole thing will slip. Have also read about a spring screw that should be replaced and if necessary a slight increase in the pressure in the gearbox. Anyone else’s idea? Point 3: The car has some game in the steering. By playing I mean that the steering wheel can safely turn 2-3 centimetres to the right, in which no reaction on the axle arrives. Which points should be checked then. Here is someone’s idea? For more information. I’m not a mechanic myself, but I’m not completely ignorant either. A friend is a master and now self-employed (leader at MB). I’d like to hire him to do this, but I know that not everyone at MB is really fit about the topic of G-Class. That’s why I hope to get some impressions and ideas for the above-mentioned things and thus to streamline the whole process. “The needle in the haystack can be found faster if you know about where it can be located. nte.” Thank you in advance. Greetings Nick