JanaHenderson

My 2001 ML430 has developed a hissing sound under the driver side dash. The problem is getting worse. It sounds like air escaping from a leaky hose. No dripping, fluid, or anything notable. Before pulling the driver side panel, what possibly is at cause / what should I be looking for?

I cannot imagine there are too many pressurized air sources under the driver's side dash.


Vehicle has about 150K miles and few if any problems to date.

Maj. Dundee

Your brake booster is leaking vacuum and needs replacing. Buy one at a junk yard.

https://mbworld.org/forums/search.php?searchid=12084423

DrX

You know Major, these links to forum searches never work.

Maj. Dundee

I see that now. And also you can never post the same exact link twice. You have to copy and paste your original posting to get the message across to another member.

Why does this site operate so differently?