Since ill be writing about my car, i figured id give a bit of a background into the Stageas :)

Nissan Stagea:

There are 3 different versions of the Stagea, WC34 Series 1 (1996 to late 1998), WC34 Series 2 (late 1998 to 2001) and the M35 Series (2001 to 2007). I have a Series 1 RS4.

The Stagea is commonly referred to as the Skyline wagon (because it shares many mechanical parts as the R33 Nissan Skyline and Nissan Laurel) is a station wagon originally produced by Nissan in 1996.

Series 1 C34

The Stagea was available with a 2.0L single cam, a 2.5L twin cam n/a, a 2.5L twin cam turbo or 2.6L twin cam, twin turbo engine. All engines were from the RB range, with the 2.6L (260RS model) being the same as that equipped in the Nissan R33 GTR. Engine power ranged from 114 kW (153 hp) in the 2.0l to 172 kW (231 hp) in the 2.5l turbo and 206 kW (276 hp) in the 2.6L twin turbo.
The Stagea was available in 2WD (RWD) and AWD variants, with the RWD variants using RWD Laurel front suspension (strut type) and AWD versions using RWD r34 Skyline (multiple link) front suspension. Both RWD and AWD shared its chassis platform with the C35 Laurel, which had the same wheelbase of 2720mm, and was also available in RWD and AWD. The chassis between 2WD and AWD did have some differences, the main being that the driver's side chassis rail on the AWD version was positioned closer to the lower sill. This was done to make room for the transfer case located on the end of the AWD transmission.
The AWD system, ATTESA E-TS, is identical in operation to the Nissan Skyline GTS-FOUR and GTR AWD system. As an added extra, the AWD Stageas fitted with an automatic transmission also featured a transfer case lock; this locked the transfer case in full 4wd and bypassed the ABS, g-force sensor inputs and ATTESA E-TS ecu which were all normally required for the AWD system to work.
Unlike the Skyline and Laurel which had 5 speed automatic transmissions on some automatic 2.5L non turbo versions, all automatic Stageas were 4 speed. All manual models were 5 speed although only 2 models were available manual, the turbo RS4 and the 260RS, which was exclusively manual.

Specs
Frame: E-WGC34 (2WD); E-WGNC34 (4WD)
Exterior dimensions (LxWxH): 4,800 mm (189.0 in) x 1,755 mm (69.1 in) x 1,495 mm (58.9 in)
Interior dimensions (LxWxH): 1,900 mm (74.8 in) x 1,425 mm (56.1 in) x 1,155 mm (45.5 in)
Wheel base: 2,720 mm (107.1 in)
Treads (F/R): 1,460 mm (57.5 in) / 1,515 mm (59.6 in)
Ground clearance: 145 mm (5.7 in)
Curb vehicle weight: 1,620 kg (3,571 lb)

Series 1 paint options
Sonic Silver (M, Code: KR4) (super fine hard coat)
Dark blue matte (super fine hard coat)
Emerald green pearl (M) (super fine hard coat)
Fire clear red II (super fine hard coat)
Silky Snow (Code: WK1)

Series 2 C34

WC34 series 2 (1998 to 2001) was basically the same as the Series 1. The headlights were changed in shape and made from high impact plastic (previous model had glass headlights) and the fog/auxiliary light moved into the grill. The indicators were changed to a clear unit, and changed shape slightly. Front aero was slightly revised and body mouldings colour matched. Interior trim choices were also changed.
It has the same engine choices, but they are the uprated NEO version of the RB series and higher spec models included a tiptronic auto transmission. The power ranges from 114 kW (153 hp) in the 2l to 206 kW (276 hp) for the 2.5l turbo and 2.6L twin turbo. 2WD and 4WD versions available. A choice of transmissions is also available: 4-speed auto, 4-speed tip-tronic auto and 5-speed manual for the turbo RS FOUR S and 260RS.

260RS

1734 260RS Prouduced
986 260RS (Series 1.5)
748 260RS (Series 2)

Split into:
Series 1:
KJ6 Dark Bluish Black Pearl: 196
KR4 Sonic Silver: 138
WK1 Silky Snow Pearl: 652

Series 2:
GV1 Black Pearl: 122
KR4 Sonic Silver: 192
QT1 Pearl White: 434

Autech Stageas

Special versions of the Series 1 and 2's were also produced by Autech. These are fitted with the RB26DETT and four wheel drive system from the Skyline GTR along with the 5 speed manual. The body is also made stiffer, and the drivetrain is strengthened. These are very rare and fetch a hefty price.

The AUTECH version has the following extras:

Mechanics
Rear mechanical LSD
Special exhaust system
Improved suspension system
Special rear stabilizer
Brembo brake system
Front strut tower bar
Body strengthening
Front crossbar
Strengthening tunnel stay
Triple crossbar

Exterior
BBS made forged aluminum wheels
Special front bumper
Super fine hard paint
Rear under protector

Interior
MOMO sport steering wheel
Special seat trim
Leather shift knob
Leather parking brake lever
GTR style meters (front torque, oil pressure and temperature)

M35 Stagea

The M35 series (2001 to 2007) looks very different from the previous C34 models and is derived from the Skyline/G35 sedan (V35 platform). As per the Skyline the engine was changed from the RB series I6 to the VQ series V6.
The Autech Axis 350S was the only M35 chassis Stagea to ever be offered with a manual transmission and was produced from October 2003 to June 2004.

End of life
Nissan ceased production of the Stagea in early June 2007, Nissan Japan stated that it would continue to sell the remaining stock of the vehicle but that production of the vehicle had ended.

Info sourced from Wiki and SAU

Handy Links

GT-R Registry

In the following links you can find the VIN/colour/type/date/engine/transmission/suspension/drive/interior/model code and specifications list from the model code options.
There is a huge amount of special editions and different types. In fact, there are 42 different C34 types (when split by series) and 66 different M35 types! There are also quite a lot of very rare 1 of 1 colours, that you can check out in the Colours breakdown, and cross reference on the VIN tables. (For example, the only C34 painted KT2 Bluish Silver is: WHC34-001645 and the only M35 painted 621 Pure White is: M35-108380)

The colour charts are located:
C34: http://gtr-registry.com/en-c34-colours.php
M35: http://gtr-registry.com/en-m35-colours.php

The VIN tables are located:
C34
WGC34: http://gtr-registry.com/en-wgc34-vin-table.php
WGNC34: http://gtr-registry.com/en-wgnc34-vin-table.php
WHC34: http://gtr-registry.com/en-whc34-vin-table.php

M35
M35: http://gtr-registry.com/en-m35-vin-table.php
HM35: http://gtr-registry.com/en-hm35-vin-table.php
NM35: http://gtr-registry.com/en-nm35-vin-table.php
PM35: http://gtr-registry.com/en-pm35-vin-table.php
PNM35: http://gtr-registry.com/en-pnm35-vin-table.php

The Production charts are located:
C34: http://gtr-registry.com/en-c34-production.php
M35: http://gtr-registry.com/en-m35-production.php

Credit to Mark Dodds of GT-R Registry

P.S My latest stagea mod - installation of new cat :)