Nissan Primera P12 F9Q clutch repair

Car: Nissan Primera P12 F9Q, 2005, 6speed manual

I have a leak of clutch fluid inside the clutch housing.
Is it true that the engine has to be lowered in order to see what is leaking? If so this sound like such a major repair that I'd like to replace all the parts that tend to wear out while I'm at it. That means I should get all the parts before I start the repair. I'm trying to gather a list of which parts I should get.

The local Nissan dealer isn't very helpful. They keep trying to sell me the clutch master cylinder and outside tubing, while they don't offer any information of the parts that goes inside the gearbox/clutch housing.

From Nissan4u.com I've found that the clutch slave cylinder has part number 30620AE800
Looking up that part number on ebay it seems like that part includes all inside tubing and gaskets. But look at the picture of these two listings:
http://www.ebay.com/itm/RENAULT-MEGANE-Clutch-Concentric-Slave-Cylinder-CSC-1-9-2-0-2002-on-510008810-/232082634397?hash=item360933f69d:g:ymYAAOSwmfhX2ae4

http://www.ebay.com/itm/Valeo-Central-Slave-Cylinder-804526-/361432360674?hash=item54270c26e2:g:rSYAAOSw6n5XsCom

It seem like the first is made of metal, while the second looks plastic. Is there a major quality difference between these two?

The other part I'd guess is smart to replace is the clutch disc, part 30100AW301

I've heard that a special tool is needed for clutch disk replacement. Does anyone have a name for that tool?

Would that be all the parts I need? No gaskets?

I can't believe someone would use plastic there. I though it just looked like plastic. Does the first link seem to include all I need?

Thanks gt

I struggle to find part number for pressure plate. (I don't know how to expect it to look.) Is the partnumber for clutch plate a kit of both?
http://nissan4u.com/parts/primera/el_p12e/2005_8/type_104/power_train/clutch/illustration_3/


The ebay links a bit to long to be copy/paste friendly. Here are the shortened versions of the two posted in first post:
https://goo.gl/CnALf0
https://goo.gl/WXXoux

Could you help me find those parts on ebay (or some other sites that ships to norway) or the part numbers from Nissan? I've found 30100AW301 which the catalog list as clutch plate, while ebay searches returns parts that looks like pressure plate. And I've found 30620AE800 to be the slave cylinder listed on ebay here: http://goo.gl/CnALf0

Thats two out of four parts.
Could the release bearing be included with the slave cylinder?

The pilot bearing is the bit part where the input shaft goes into,you don't need that unless it's buggered..

Yes the release bearing must be part of the slave cylinder I remember now since you told me that,i've work on a few cars since and do forget about things sometimes..