ZzzzZzz sound while driving

[Guest E250cab]

realised that there is this weird zzzZzz sound coming out from the front.. area where we place our IU.. was this an interference between the speaker with our car IU.. anyone have similar problem.. the sound is intermittent but getting worst.. especially when traveling at rough surface

any thoughts ??

[Guest Kueitutu]

Bro, I have the same issue with my ecab... No matter how I try to find the source I can't pin point any....

Even why I off the comand, I will still this sound... I had initially tot some bee or insect stuck somewhere!!

[Guest E250cab]

opps .. looks like not an isolated issue.. Intially thought that it's the IU that is making the noise and went to LTA to replace the IU.. but sound still persist. thought of bringing it to the dealer to check but worried that the car will there for the whole day and no findings after all...

anyone had similar issue and have the root cause ?? pls help

[Guest DarkAngelc]

Bros...manage to ID the problem???

Is it on and off while you're driving?

[Guest blackmercs]

opps .. looks like not an isolated issue.. Intially thought that it's the IU that is making the noise and went to LTA to replace the IU.. but sound still persist. thought of bringing it to the dealer to check but worried that the car will there for the whole day and no findings after all...

anyone had similar issue and have the root cause ?? pls help

Any modications recently? Like speakers system or steering etc?

[Guest Chia 699]

Yep I do get this noise also, but for mine it's coming from the rear.

Suspect it's caused by the rear seat-belts (the internal component hidden from view), or the storage basket fitted by C&C in the boot.

[Guest E250cab]

no.. problem still exists and too busy to bring it down.. it's not knocking sound.. it's more like zzzzz sound..

[Guest DarkAngelc]

Searched the net and found the followings http://mbworld.org/forums/esp_search.php?query=hissing+sound&type=all&ref=esp-tab-all&page=5

Possible reasons:

- Brake booster faulty(very EX to repair).

- Airmatic Issue

Somehow I do not think it is related to the above. Any bros here also have this issue??? It's really irritating. Only way is to ON audio to mask the zzzzz or hissing sound.

My ride: W211 FL 2007 version

[Guest E250cab]

are yours frm the rear or front? I still feel that it's coming from the IU or speaker interference will find sometime to make another trip to LTA this week

[Guest Kueitutu]

My zzzz sound has not surfaced for quite awhile after I opened my top afew times. Will monitor again the next few days and see if the sound comes back again