I know not the answer you want to hear but allll the major parts stores have crazy deals . YOu ' d just have to build it yourself , which really isn ' t that difficult . <| sep |> Marquee Matchups got posted that ' s all <| sep |> Patrick Kane for Hainsey ! Sounds fair to me . <| sep |> Did the valves damage the pistons ? If the valves aren ' t able to close as the piston rises , they can slam into it and cause damage to the pistons , cylinder walls , piston rings , crankshaft , etc . Get a borescope and have a look around inside the affected cylinders through the spark plug holes . If there ' s no damage to the top of the pistons you could probably get away with just a disassembly and carbon clean up . This can be done with the engine still in the car and should cost just a few hours of labour . However , It ' s also possible that the valves are bent or damaged , which could have damaged the inside of the head of the engine . This would likely give off a camshaft timing error along with the misfire code . So you should be able to have an educated guess if this happened . Do you happen to know what the CEL codes are ? Regardless of the damage , I wouldn ' t bother with an engine swap . At that price you can likely find a newer whole vehicle with maybe less mileage . Out of curiosity , did you use regular fuel in the vehicle ? My C 280 with over 200 k kilometers on it has almost no carbon build up at all in it , and MBs aren ' t usually prone to this sort of buildup .