How do you bleed the lines on a Benz 300sd?

Answer 1

I assume you are trying to bleed the brake system, not the diesel injection system.

Manually bleeding with two people is a simple procedure:

WARNING: Never release the brake pedal when a bleeder valve is open !!!

Fill the master cylinder reservoir to the top.

There are two reservoir chambers, the rear is difficult to see and easy to empty out by accident.

#1. With all the bleeders closed, have your helper pump the pedal three or four times then hold down the pedal.

#2. Open the selected bleeder that's furthest from the master cylinder (Right rear on left hand drive cars).

#3. Close the bleeder when the flow stops.

#4. Have your helper release the brake pedal.

#5. Repeat until solid clean fluid comes out, no air.

#6. Re-fill the master cylinder reservoir to the top.

#7. Repeat at the left rear, then the right front, and finally the left front.

Make absolutely sure the reservoirs are full during this whole procedure, or you'll be starting over.

Some 300SD have ABS and may require a brake pressure bleeder to flush all air from the system.