assuming my AC isn't totally kaput, my wife has ok'd the head gasket replacement on my 300E.
For those of you who've had it done, what sort of price should I be looking at for the head gasket, machining the head and a valve job?
Also, I know this is a 'how long is a peice of string' question, but how long should I expect the new gasket last before it leaks again?

cheers.

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1993 320TE M104
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past:

1983 230E W123 M102
1994 E300D S124 OM606 (x2)
1967 250SE W108 M129
1972 280se 3.5 W108 M116
1980 280SE W116 M110
1980 350SE W116 M116
1992 300E W124 M103
1994 E280 W124 M104
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"music and women I cannot but give way to, whatever my business" -Pepys