W202 C280 Whining noise

[PBF]

Hi, i am looking for some advice,when i first start my car up there is a whining noise coming from the front of the car,it quietens down a little when warmer.
I have changed the ina Deflection Pulley Drive Belt Tensioner also the drive belt with a ContiTech Drive Belt,but alas this had made no difference, any idea what i should change or test next.

Thanks Paul

 

[Chalpkin]

Hi PBF,
I find slowing down when the SWMBO asks stops most annoying whines
;-)

 

[PBF]

Hi I've taken a short video of the whining noise any help would be appreciated. Here's the link:

MVI 2206 - YouTube

Thanks Paul

 

[chubbs111]

take off the aux belt and run it again if the noise dissapears its either alternator or belt idler pulley i suspect its the alternator try spraying some wd40 into the alternator

 

[rorf]

Yip, could be alternator or water pump, power steering pump, aircon and even the timing chain

 

[Vlad]

That's just the typical alternator whine that all Mercs of this age make on start up, which then goes once the engine comes off choke and has topped up the battery and the load on the alternator decreases.

 

[aka$h]

Sounds like a noisy secondary air pump

 

[PBF]

Thanks for the replies.
I have taken the drive /fan belt off the car as suggested and started the car up
but this has made no difference to the whining noise,
any information would be appreciated.

Thanks Paul

 

[aka$h]

The air pump is electronic, if you pm me your vin I can check if your car has one

 

[PBF]

Hi, i cant pm yet as dont have 30 posts,
my vin is WDB2020892F902302,
Thanks

 

[tonyc280]

Sounds like Alternator bearing to me!!! Cheers, tony C