Hello, we have an engine damage at our 2012 Smart 451 cdi 54ps pulse 200000 km. The exhaust cooler has become leaky and water has come into the combustion room, now oil gets into the combustion. Actually, I had already written it on but now I ask myself if it would not make sense to have the engine replaced. We have been very spoiled by the small one. The only defect we had at about 80000km running power, the water cooler. Otherwise he has not seen a workshop, oil and brakes change myself. I do not count wild accidents. It will probably cost 4000 euros, with a few attachments. Certainly everyone has to decide this themselves, but I do it hard and would be grateful for a couple of opinions.