problem solved -good news at last!!!!

[zsadiq1]

About a year ago I posted a thread asking if anyone could give me advice on a problem with my E320 (2003 model). A squealing noise was coming from the engine when it had been stationary (with the engine off) for a while. The noise was intermittent but could go on for half an hour. I couldn't exactly locate the noise and I took it to the dealer on a few occasions but the noise didn't appear and they couldn't find anything wrong. However, a couple of days ago it started squealing away so I got out my stethoscope (yes I'm a doc) and listened to the various parts of the engine. I put my steth on a pipe (right front lower) and every time the noise came I could hear a gurgling sound in the pipe. I think it must be the air conditioning pipe. Does anyone know what might be going on? The air con has been working fine. I have booked it in to the dealer again - I'll let you know what happens.

 

[Parrot of Doom]

Possibly a poor seal or leaky pipe?

 

[dogsbody]

problem solved -good news at last!!!

Are you sure that the noise you hear intermittently is not the air con belt slipping slightly.. does it need replacement or tightening?

 

[Parrot of Doom]

Just to add, on my previous cars (VAG Audis), the aircon often makes noises after the engine has been shut off. I presume its just liquids moving around while the temperature of the various components becomes balanced.

 

[zsadiq1]

problem solved

There are no belts running at the time. The noise is definitely coming from a pipe. The noise is definitely abnormal- you would be embarrassed to say it was your mercedes if someone could hear it!! I assume there is some sort of build up of pressure in the pipe.