Clutch Master Cylinder Rebuild question

[BHap]

I have the Mercedes kit to rebuild my clutch master cylinder.  There is a rubber "bumper" with a hole in the center that fits the push rod.  Can anyone tell me the order of assembly ?  Spring < Piston < bumper? < washer < snap ring < boot < pushrod  or does the bumper go on top of the flat washer ?  I don't think I saw one coming out - so I'm not sure where this piece goes.  It has a "step" in the diameter and one end seems to fit the push end of the piston.  Also - does anything hold the boot into the master cylinder or do you just push it into the top?  Any help is appreciated...

Bob Happe
70 280SL, 4 speed

this is a link to a similar kit on ebay - the piece in question is the rubber piece on the right: http://cgi.ebay.com/ebaymotors/Mercedes-Benz-280-250-230-Clutch-Master-Cylinder-Kit-/280601176790?pt=Vintage_Car_Truck_Parts_Accessories&hash=item4155222ad6

[BHap]

According to the Classic Center, the extra rubber "donut"/bushing is a grommet for a reservoir tank for models that mount direct to the master cylinder - essentially a "multi application" kit....  not needed on the 280SL...

[GGR]

I don't know on the SL, but on the 3.5 Coupe that donut goes in the cavity where the line from the brake fluid line arrives to feed the system.

[BHap]

So on the 3.5 coupe the line feeding the brake fluid is not a compression fitting/hard line ?