Rear main seal replacement cost?

[pburgess22]

Hey all,

Any know roughly how much it would cost to have the rear main seal replaced on my 2009 2.0tsi?
Cars misfiring across all cylinders and is particularly bad when cold.

Its been sat at a dealership for 5 weeks and they cant work out whats wrong with it.
So far its had new pcv valve, coils, plugs, fuel filter and 4 injectors and its still running like crap.

There is an oil leak spotted at the back of the engine and I can only think the rear main has blown and replacing the pcv valve only cured half the cause of the issue.

I dont think its a carbon build up as it went from fine to lumpy as hell over night and when changing the fuel injectors vw said they valves weren't that bad at all.

Any other thoughts on possible causes would be much appreciated.

Hope this nightmare ends soon......