Thanks BB. I do recall those discussions and I clearly remember the two chambers on the SD. But, the SDL is different. The rear chamber can really fool you. You cannot see it from the driver's side of the vehicle.

Is the W124 the same?

I'll give the easibleed a whirl. It maintains a fluid level right up to the cap and will introduce no air unless one runs the bottle out of fluid.

Hopefully I get lucky with it.