I have to say that the first time was a PIA but after that I just did my new/old 300 in about 30 minutes one afternoon.

I made my own set of crude wrenches for this purpose by buying some cheapy wrenches and then heating them with a torch and then bending them with a cheater pipe. I used a picture of the hazet wrenches as my blueprint.

Worked out pretty good and if I can't get enough leverage with these cheapies then I pull out my standard wrench to break something loose...

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'99 S420 - Mommies
'72 280SE 4.5 - looking to breathe life into it
'84 300SD Grey - Sold
'85 300SD Silver - Sold
'78 Ski Nautique