Mecerdes Benz whining noise fixed!

2012 MB E350 Blue Efficiency
How to replace idler pulley.

[@MrGixxerred]

Just picked up a used salvage C300 with 62k miles making the exact same noise. Your video was spot on and helped me make the decision to buy the car. Replaced the pulley and she sounds great now. Thank you!

[@minorityreport2125]

Great video. This noise is precisely what my S class came back with after Mercedes has done B Service! You bring the car and it comes back better on 5 things and worst on 1. Sometimes I wonder what happens to your car when it disappears at the drop and you pick it up the same day. Because S class are well noise insulated this noise sounds very quiet inside but you can pick it up. Initially you think it comes via radio but no. It is revs dependant and this video perfectly shows what it is.

[@guido542]

My Mercedes has the same issue, I went at least to 4 different mechanics and they told me it could be: steering pump, ac compressor, transmission, bla, bla, bla, I bought the serpentine tensioner so we'll see what happens!! Amazing video!!🙌

[@ehehhefn8631]

Updates? Thx

[@guido542]

@@ehehhefn8631 The problem was fixed!!!!! 😀

[@ehehhefn8631]

@@guido542 did you change only the belt kit or the alternator pulley too?

[@guido542]

​@@ehehhefn8631 just de pulley kit

[@guido542]

​@@ehehhefn8631just the pulley kit and belt

[@kennywhite5850]

Thank you soooo much

[@arditvucetaj2865]

I have a whooshing sound inside the cabin while driving more than 20km per hour, no noise when idle. What could it be? The noise is very uncomfortable when driving in long roads.

[@107gates]

Ya bacc windows must be down

[@yaboyleoo]

How did you pinpoint the noise?

[@davincifilmz6819]

thank you, ive done changed the power-steering on my 2010 e350 4matic and the same issue was there but after inspecting myself i can hear it coming from the idler $900 down the drain......

[@curtisiii5312]

Link for part please and is a special socket needed? Or any metric socket work?

[@JeanMelim]

E-Tork... in this vídeo E-12

[@balpreetsingh559]

Is it really that bad? Does it do any additional damage to the car? i have the same whine but i dont want to spend any more money on the car. That sound doesnt really bother me a lot, if it doesnt do any additional damage, ill just let it be. It kinda sound like a supercharger whine lmao

[@nikko7507]

Can Spray some w40/pb blaster on the pulleys and belt . Like just spray around the pulleys whilst they’re on to see if it gives lubricantion ??as my Merc is making that whiny sound , sure it’s the pulleys or alternator !! I’d rather spend on them before assuming it’s the trans !

[@ehehhefn8631]

Did you solve?

[@nikko7507]

Never got resolved as the car broke down on the day i was purchasing a BMW !!! Sold the merc that month luckily , it was a motor issue though

[@nikko7507]

It’s not easy to diagnose tbh !!! So i wouldnt waste the time & money …could try change alternator - if its not that , could be transmission etc - so get rid !!

[@FCB19873]

what about second idle pulley? How to replace it, it is blocked by air intake ...

[@03chamberlain]

Just take off the intake or your saying it’s begging the manifold

[@jamalpurnell1957]

Whats the part number?

[@vicpagan]

El duro no!!!!

[@YDiaz2]

Thanks for the love bro 💪💪

[@emian722]

i have a sound like this but i dont need to push the gas is loud and is coming from the engine

[@YDiaz2]

It could be a number of things. Alternator, Tensioner pulley, or even something in the trans. Most common one is the pulley. Spray some w40/pb blaster on the pulley and see if the sound goes away.

[@emian722]

Hopefully is something cheap lol

[@YDiaz2]

@@emian722 fingers crossed 🤞🤞

[@CrazykidEd]

Ayii.tv maybe it’s your motor

[@dartanzalw]

Damn shame Car only has 60k Was hoping that was it Has a little play in it

[@Edd1e8]

Did you get a burnt metal smell too? Mine seems higher pitched

[@iOllie]

I’m getting a weird smell, also the noise on my new video which is now quite frequent.. garage got no idea

[@Edd1e8]

@@iOllie mine ended up being my alternator.

[@williamfarrell4394]

Do you have a video of the sound mate I'm having a nightmare diagnosing mine 🤦‍♂️

[@shawnmohamed2978]

Never showed what the problem sounds was. Need to explain more as you are installing

[@doraozuna2042]

Kkkkkkkkkkk

[@juliandodwell8213]

A 17mm socket does nt fit nor 18mm or 19mm. Its seems to be a special knerl screw.

[@Salpeteroxid]

It's called E Torx. Very common on my cars at least (European cars).