About how many hours labor does it usually take (barring any unforseen difficulties) to just R&R the heads on a M116? This isn't by any means a DIY job is it? Going along with that, how do I know whether my engine just needs a top end opposed to an entire rebuilt engine? Or is it worth JUST doing the top end and leaving the bottom? I have heard that the bottom ends of these cars are pretty stout. Any advice is appreciated.

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'86 420SE Euro
904 Midnight Blue, Gray Velour
Dad bought it new, now I own it.

"A Mercedes-Benz is like a fine wine, it only gets better with age."