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Noise at start only

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Old 08-28-2003, 01:48 PM
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ML500 and A64.2 sport
Question Noise at start only

When it is cold I get a whistling noise which seems to come from under the dash on the driver's side. It goes away after a minute or so. Length of time depends on outside temperature.

It is quite loud and annoying.

Any idea as to what it can be?
Old 08-28-2003, 03:25 PM
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Re: Noise at start only

Originally posted by EgilML500
When it is cold I get a whistling noise which seems to come from under the dash on the driver's side. It goes away after a minute or so. Length of time depends on outside temperature.

It is quite loud and annoying.

Any idea as to what it can be?
Sounds like a jet engine almost? Try popping the hood next time you start it and you should hear it pretty loud from the engine bay. It is probably the air injection pump (which makes a whining sound) which runs for about 30 seconds to a minute, longer if it is cold outside. A lot of people complain about the ECU fan which is located on the drivers side and the fan will sometimes make noises but usually that noise is continuous... I think it is one of those 2 possibilities, take it in to the dealer to be sure.
Old 08-28-2003, 05:21 PM
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its the fan on the left side of the dash, i had mine replaced about 1 month ago. The dealer knows what it is.
Old 08-28-2003, 09:06 PM
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Originally posted by haild
its the fan on the left side of the dash, i had mine replaced about 1 month ago. The dealer knows what it is.
Thank's for the Info. Dealer said they did not know but I'll pass this information on to them.
Old 08-28-2003, 09:08 PM
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Thumbs up Re: Re: Noise at start only

Originally posted by AlBoston
Sounds like a jet engine almost? Try popping the hood next time you start it and you should hear it pretty loud from the engine bay. It is probably the air injection pump (which makes a whining sound) which runs for about 30 seconds to a minute, longer if it is cold outside. A lot of people complain about the ECU fan which is located on the drivers side and the fan will sometimes make noises but usually that noise is continuous... I think it is one of those 2 possibilities, take it in to the dealer to be sure.

Thanks.
Will do.
Old 08-28-2003, 10:15 PM
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ml430
its the aux fan that needs to be fixed
Old 08-28-2003, 11:19 PM
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Originally posted by haild
its the aux fan that needs to be fixed
Did you have a similar problem?
I now have three possible items, I believe.
Old 08-29-2003, 07:53 AM
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yes i did.

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