Hello dear motor-talker, First of all, I used the “search” and read myself about this model, yet I have a few questions, who has desire and time can answer me gladly. I think about buying a SLK 350 R171 Sportmotor 305ps for the next few years. My questions: As I understood this is a relatively solid engine, which has hardly any defects. For cylinder coating, which consists of aluminum-sil? I know engines M278 I mean the also this coating but have these come in. Why doesn’t this happen here ? Chain problem should have been fixed as I understand since the sports engines have been built ? Suction flaps should cause problems with the M272 with 272ps, what kind of technology does the sports motor that it is not affected by ? Other defects, oil loss (where) and thermostat + water pump should be a topic, is that correct ? Difficult to exchange yourself ? General durability, your running performance would i Sound: What exhaust systems do you have under it, the SLK 55 should be violent, but registration almost impossible? Consumption: How much do you consume especially in the city ? Track profile: does the engine pack away short distance well ? Body –> As far as solid as I have understood ? (Backach’s problem should be taken over by Mercedes) Refueling: Does the engine need Super or Super Plus. (If Super makes possible, does it also make the same performance ?) Makes sense to have a now 2024 z u buy because the cars are not getting younger? Which equipment is the most important in the car? Sound system to the standard system sports package Usw. I thank you already in advance, for answering my questions and wish you a nice day. Greetings