How do I do that ? I found the solenoid valve plug, it has two wires going to it , my guess is one is ground and the other is 12v I'm I right ? What I consider doing is to run 12v through a switch which when turned on supples 12v to the solenoid plug and activates the solenoid.
Here is a diagram of the ASD http://www.knapplane.plus.com/190e/ASDboschdiagram.jpg

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190E 3.0-24v (M104 980) turbo @ 0.8 bar
1/4 mile: 2.483 / 13.540 / 175.17 km/h (street tires)