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W212 E350 2013 4matic shimming noise between 15-48 mph
W212 E350 2013 4matic shimming noise between 15-48 mph. Noise volume reduced after replacing 2 idle pulley, belt, and tensioner pulley. No noise when engine running but stopped.
What does that mean? You only hear the noise when the car is in motion? When the car is in park or in gear, idling, no noise? Do you feel vibration or only noise?
No. Noise significantly louder when accelerate before I replace last part tensioner pulley. But now after tensioner pulley rep0lace noise more significant when slowing down.
Before any fix done it very loud. First I replaced the idle pulley above tensioner pulley. This car didn't have power steering pulley. Noise not reduced. Then I replace pulley on top of alternator and belt serpentine and noise reduced. Then last piece tensioner pulley which make noise if I rotate manually but after replaced noise still there but not loud anymore. The noise only happened when car moving. I start engine and still in Park increase RPM until 3500 and no noise. W212.088 M276 E350 2013 4matic
Last edited by andynmaas; Jan 3, 2021 at 12:22 PM.
Never heard of any noise described as shimming, so I’m at a loss. Everything you have replaced would create noises at idle, under acceleration, standing still, while moving, etc. You get my drift.
Noises while moving could be collapsed motor mounts, bad axle(s), hub, dragging brake, differential, transfer case, etc.
No power steering belt because it is an electric assist motor.
As @KEY08 states, I wouldn't describe a sound as shimming... that's why I asked if it something you feel and/or hear as well. You could have multiple issues going on... How many miles on the car?
Sounds like you fixed one issue, worn accessory belt components (idler pulleys, tensioner and belt), which usually is heard audibly at idle as squeaks. Now you have a separate issue of noise only while in motion. So again, you only hear noise? No vibration is seat, floor by pedals, steering wheel, etc..? Is it RPM related, is it speed related, while coasting, while accelerating, while decelerating, while braking, while turning, slow speed turns in parking lot, etc...
Has the noise started after any recent maintenance?
The car had history of front axel break and I think it create same sound before it break. It happened around one year after I hit pot hole around 2 inches deep which that time blow out front tire and bend both front and rear wheel on passenger side. It make noise until it broke loose and hit catalytic converter
I bring to the shop repaired the axle but he suspect belt system. with below estimate
The part very expensive and it easy to do so I replace myself.
One idle pulley I bought from Mercedes which is very expensive US $87.50. The second pulley is OEM Litens (900667A) bought from Advance Auto Part which is identical bearing as the original from Mercedes for US $ 30. Belt is Dayco 5060840 6PK2135 around $32 from Advance and Tensioner INA 276 200 03 70 which had Gates brand on the product and it label as OEM around $60 from Advance which bought the same day from wholesaler WordPac cheaper than Mercedes which want it for $250.
Actually first I suspect something on related to axel because it only sound when car moving. But European shop estimate for complete set 2 idle pulley, tensioner and belt. Mercedes dealer estimate for idle pulley only around $300 but for complete set around $950. Car had 185000 miles and it didn't happened after recent maintenance. No vibration just only happened when accelerate or decelerate. It quite after reach above 50 mph steady speed.
Thanks for the video. Sound is violent and I can see the cabin shaking while you are trying to capture it on your phone. Seems like Axle(s) to me. The noise and vibration can be rpm specific with these. Come and go. That’s my guess.
185,000 miles Wow!
I also hear a chirping in the background, is the HVAC on? Sounds like a dying blower fan. On the second "run" the main noise does increase in frequency with speed. Reminds me of an old train riding down tracks, clacking away.
Looking at motor mounts isn't a way to diagnose them. From the video, that's not your "noise" issue. It could be a separate issue as well, that's a lot of miles without knowing full history.
Last edited by bmwpowere36m3; Jan 3, 2021 at 10:59 PM.
The old train you hear is cause by concrete road in Dallas for local or small road they made junction between block of concrete road not smooth so it will sound like train pass connecting rail. I think I have to check drive shaft bearing and flex disc which may be damaged too after I hit pot hole more than a year ago which cause front axle broke around July 2019 which hit and broke catalytics and oxygen sensor close to that. That time it also make noise and I think the noise is similar but louder.
Suffice to say, this is a drivetrain issue and not a pulley and belt issue. Could be anything that is in motion when driving including worn tires. Driveshaft also and everything else I mentioned above. You need more drive and less train. Plus at 185K maybe it’s time to let go of this car.
Hi I found out what make noise it is again front driveshaft failed again around 172000 after replaced at 120000
I had Mercedes E350 2013 4Matic bought 2016 with 43000 miles. At 121000 on 2/7/2019 front driveshaft broke after making sound for around 3 months. It broke catalytic converter and oxygen sensor. Actually it broke when mechanic drive tested it. Can we blame to shop? I don't we can right. So it fixed for around $2500. Then now at 172000 miles 4/10/2021 it left me stranded around 140 miles and cost me $500 for towing to home. The closest shop is 46 miles but it about to close on Sat and will open Monday. Geico tow is scam they claimed it cover up to 100 miles but only to close shop and didn't care if shop will close if more than that they only cover 20 miles. So lesson learned get AAA for around 100 per year for up to 200 miles with no condition.
Look like it common problem because I seen in youtube same problem E350 2013 4matic
I resolved the humming noise. I found one of clip that hold the oxygen sensor is loose so it hanging and it make noise when car running because of wind blow on it. I just found it accidentally when I fix problem in transfer case which I have to open the front exhaust on passenger side. The shop that fixed front drive shaft few months ago didn't properly hook the oxygen sensor and left one of them unhook and it hanging loose. I did replace belt, idle pulley and tensioner pulley and still not resolved the noise.
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