HI all,

I've seen this on a couple of 300SD. You start the car, let it idle for 10-20 seconds. When you press on the brake, a very increased pressure is required, as if you have no vacuum boost. Is this normal because vacuum is slow to build up, or do I have a problem somewhere? If this was normal, I'm sure the engineers at MB would have made it un-normal by adding a vacuum storage device. Both cars I've seen this on would shut off fine.

Anyone got an idea?

Marty

www.benzbonz.biz