I agree, I wouldn't attempt the job without the manuals.
My MB-WIS has extremely detailed instructions on how to remove the '99s head....I've looked them up because I'll be changing my glowplugs this week too--and they're all original at 158k(!)

I think there are some special tools required that are also listed in the manual. Correct me if I'm wrong, I believe the engine position for head removal is Cyl 1 TDC?

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99 E300 TD -- sold
01 540i 6 spd