For the last months, every morning (I assume when the Car is Cold), when opening the ignition contact (still with the engine off), there is a chirping sound that last forabout 20-30 seconds and then dissapears. It seems it comes from inside the dashboard panel closer to the driver side, but I may be wrong. Any idea what it may be?
Thank you

 

there is an issue with the fuse box aspirator motor or fan. this a problem on MLs. motor is under fuse box must remove the other cover on the fuse box behind the front lid. replace motor you will be ok.

 

any idea on the easiest way how and where to purchase the fan? is this a job I could do myself or its complicated?
Thanks again

 

job is easy to do , i can only say buy at the dealer, you will need torx bits to remove the motor 3 screws i think , motor us under a bunch of wires and harness's so becare full not to pull wires out of the bottom of the fuse box when working and dont pinch any when putting in motor. left rear engine compartment in module box/ fuse box. the new motor should look slightly differnt than the one that you take out, should be taller by a half inch or 1 inch maybe. its been updated. I havent heard your noise but its a chirping sound usually only when cold outside at start up then goes away after few minutes. just make sure that noise is not something else. but that noise is nery common on ML. good luck i hope this helps you. let me know.