I replaced mine a couple of years ago and it's not too hard. The fittings on mine came off fairly easily and I used some plumber's teflon tape when I reattached them (probably didn't need to but I figured couldn't hurt as long as I didn't block the line), be sure not to over tighten! Getting the new lines in is a bit of a rubex cube but as I recall not as hard as it looks. The trick is to pay attention to how they come out! I don't really remember but I vaguely recall one of them may need to be put in from below. The job can't be too hard because I don't have any nightmare memories of doing it. Then again, I'm used to working on English cars.....

LRG

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LRG
1987 300D Turbo 175K
2006 Toyota Prius, efficent but no soul
1985 300 TDT(130K miles of trouble free motoring)now sold