I use the same technique as Neil, but with one difference. Rather than having my lovely assistant bounce the back of the car, I disconnect the control rod from the level control valve arm. This does require crawling under the back of the car A single 10mm nut is all that must be removed. Move the control arm above horizontal - this will cause the suspension to fill when the engine is started. Proceed as Neil has described - the rear of the car will raise up. When the system reaches its maximum pressure - about 2 minutes - the relief valve in the level control valve will begin buzzing in a most annoying manner. Stop the engine. Insure you have the return line firmly connected to a rubber hose, which is draining into a good size container. Again, crawl under the rear of the car and move the level control valve arm below horizontal. The rear of the car will start coming down. A nasty, aerated mixture of hyrdraulic oil will come blasting out the rubber hose. This is why you firmly attach it - don't ask how I know this... Anyways, it's my opinion this method does a more thorough job of flushing the system than just bouncing the rear of the car.

- Jim