The Resistances for the stereo controls in the steering wheel are between A5 (Purple) and A16 (Pink):

All Off = 10k ohm
Vol down = 100 ohm
Vol Up = 370 ohm
CH (-) = 840 ohm
CH(+) = 2.04k ohm
MODE = 3.94k ohm

The connector E is for the telephone buttons, Purple is common, Green is Signal.
Don't get confused with the purple and green in the main A plug.

E1. Empty
E2. Purple. Steering Wheel Phone Button Common (Connected to Purple A5 in Loom)
E3. Green. Steering Wheel Phone Button Signal.
E4. to E12. Empty

The resistances for the phone buttons are:

All off = 10k Ohms
Hang Up = 47 Ohms
Pick Up = 227 Ohms