ZERO Compression on Cyl 4 & Misifires

[Lacostas]

Hey folks,

Long story short i got stranded with multiple misfires and upon inspection seems like cylinder 4 has zero compression. Misfires on cyl 4,5,6 and 2 (small ones).

Im afraid that the engine is totaled and needs rebuild, but maybe Porsche Dealer can check for broken valves and fix them, without removing the engine ?

Also if someone can do an estimation of ETA and Cost would be awesome..

Thanks as always