I installed the autodim rearview mirror in my 1995 855 today. The installation time was about 1 hour. I followed the S/V70 instruction that came with the kit but skipped the removal of the "big" terminal as stated in the installation instruction. For 850 installation, this step was not needed.

P.S. For 850 installation, no need to disconnect the battery. This step is only needed for S/V70.

1) Removed the two len caps of the overhead console lights using a small screwdriver and pressing (hard) in the "tiny" rectangle/square at the end of the len caps.
2) There were 2 Torx10 (?) screws that needed to be unscrewed.
3) Removed the console light unit and unpluged the wiring.
4) Unscrewed the 2 Torx30 screws to remove the rearview mirror.
5) Unscrewed the 2 10mm bolts that holding the driverside visor.
6) Not need to remove the visor holding clip as stated in the installation manual. There were plently room to fish the mirror wiring thru the overhead liner.
7) I left the visor hang by the wire.
8) Undid the B pillar trim by pulling it out from the upper edge. The B-pillar didn't have to be out all the way. All we wanted was to access the "red" clip that lock the A-pillar and C-pillar.
9) Turned the "red" clip anticlockwise to separate the A--pillar from C-pillar.
10) Removed the A-pillar starting from the B-pillar and worked carefully to pull it out of the clips.
11) Fished the autodim mirror wiring from the console light area thru the overhead liner to the A-pillar.
12) Routed the wiring along the A-pillar (within the clips) and down to a hole at the bottom of A-pillar.
13) Unscrewed the driver side footwell panel (kick panel, whatever you call it).
14) Looked up from the footwell panel to the A-pillar area, you should the the hole at the bottom of the A-pillar.
15) Fished the wiring down this A-pillar hole.
16) Installed the autodim rearview mirror.
17) Pluged in the wiring to the mirror, and pulled wiring to the A-pillar side as much as possible to ensure that the wiring was long enough for connection in the footwell area.
18) Installed the console light unit and len caps.
19) Installed the A-pillar trim, "red" clip, and then B-pillar trim.
20) Looked up under the footwell, and you would see a "bright yellow" spare (8 pins)connector only with 6 wires on oneside and "NO" wire on the other.
21) Unpluged the yellow connector, and inserted the mirror wire pin (Orange/Brown) to pin 2 of the yellow connector. You needed to push the wire pin hard enough to lock the pin into the connector.
22) Inserted the black wire pin into the pin 8 of the yellow connector.
22) Plugged the yellow connector back into the other half. Now, you have the autodim mirror working at all times whenever you turn the key to I or II position.
23) Looked at the big black terminal with bunch of wires going inito it next to the A-pillar.
24) Looked for the "thick" blue wire which was also next to the A-pillar side from the big terminal. This "thick" blue wire is connected to the pin 16 of this big black terminal. This blue wire is the backup light 12V supply and only be active when the car is in R.
25) Sliced/tapped the blue wire of the autodim rearview mirror to this "thick blue" wire.
26) Now, you are done.
27) Installed the kick panel.
28) To test the mirror, start the car and cover the sensor in the back of the mirror. In daytime, the mirror will turn dim slowly by itself. It will turn back to normal when you remove the hand from the back sensor.
29) With the hand still cover the back sensor, with handbrake on and brake on, move the gear to R, the dimmed mirror should go back to normal condition.
30) Now, you are really done, and enjoy!!!!

Ching-Ho Cheng
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1995 855 NA, Bilstein Shocks, K&N Filter, E-Code Lens, Apline CD-Changer