2014 C250 SPORT WHINING NOISE
Thread Starter
Newbie
Joined: Oct 2016
Posts: 5
Likes: 0
From: Laurel, MS
2014 Mercedes Benz C250 Sport
2014 C250 SPORT WHINING NOISE
Hello all! I am new to MBWorld and I need some help. I just purchased a 2014 C250 Sport with the original warranty still on it (less than 5,000 miles left!). When I begin to accelerate, there is an annoying whining noise that increases and starts back up after each gear shift until after the 3rd shift. It makes this noise even when I rev the engine up in park. Could this be the transmission or the alternator? Anybody else have similar problems like this? I'm a sweet girl so I don't know much about mechanics 
Thread Starter
Newbie
Joined: Oct 2016
Posts: 5
Likes: 0
From: Laurel, MS
2014 Mercedes Benz C250 Sport
I took it to an MB dealer last week and they said nothing was wrong with it and didn't charge me anything after a 27 point inspection. Since then it has gotten louder so I plan on going to a different MB dealer tomorrow to see what this noise is. It sounds like the alternator, transmission, or power steering pump. I know it's not the turbo spool noise. I'm about to upload a video so you can hear.
Thread Starter
Newbie
Joined: Oct 2016
Posts: 5
Likes: 0
From: Laurel, MS
2014 Mercedes Benz C250 Sport
Thread Starter
Newbie
Joined: Oct 2016
Posts: 5
Likes: 0
From: Laurel, MS
2014 Mercedes Benz C250 Sport
Trending Topics
MBWorld Fanatic!
Joined: May 2015
Posts: 4,037
Likes: 1,011
From: Miami, FL
2003 CL 600
Those engines do have a slight whine to them even when everything is good, but with the windows up you shouldn't hear anything. If it's loud, they need to track it down and replace the affected component.
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Thread Starter
Newbie
Joined: Oct 2016
Posts: 5
Likes: 0
From: Laurel, MS
2014 Mercedes Benz C250 Sport
This is the second dealer I've been to and they've both said the same thing. It's not noticeable when the A/C is on and windows up but I can hear it when nothing is on and the windows are up. I won't be keeping this car much longer. Waiting on the warranty to expire.
MBWorld Fanatic!
Joined: May 2015
Posts: 4,037
Likes: 1,011
From: Miami, FL
2003 CL 600
If it's very slight and isn't getting any worse, it's nothing to worry about. These new engines with the high pressure fuel systems are very noisy, and the simple fact is that in a C class, there's not a ton of insulation to keep you from hearing it. The S class engines are noisy, but the cars are much more substantial so you don't hear anything inside the car, no matter what. Just part of the entry level car segment.
The 271 is a good engine, when it works. The cam adjusters are pretty much the only real issue we see with them, and that's usually under warranty time or not at all.
The 271 is a good engine, when it works. The cam adjusters are pretty much the only real issue we see with them, and that's usually under warranty time or not at all.
Member
Joined: Jan 2020
Posts: 239
Likes: 23
2011 C300 Sport, 6M, Dynamic Handling Pack
It's interesting how many threads there are about whining, but they all appear to point to an incorrect solution and the problems are never resolved and chalked up to "normal whining noise" or transmission noise or pulleys. There are plenty of videos online that match the description of the whining that people are hearing and the solution appears to be a new alternator.
It appears that the alternator is shared between many models, so this is a noise that appears on many different MB cars.
It appears that the alternator is shared between many models, so this is a noise that appears on many different MB cars.
Newbie
Joined: May 2018
Posts: 2
Likes: 0
2013 c250
Yes Please Help. Anyone ever find out?
Ok.. Dealer said a year ago its normal.. Ok now there is a Whine coming from Transmission. I can hear when i change through R N D. Ok Did Trans Service oil flush and oil change.. I know it has nothing to do with original whine which is when i Accelerate and very loud .. No car sounds like mind none honda civic toyota tundra crysler mini van nothing.. But my c250 dentist drill, vacuum cleaner, sounds like its going in reverse but forward.. not power steering whine not belts squealing, But guess what mechanic says.. He tells me my little turbo is making that dentist drill.. he said that he pulled the belts off and it still made the noise and from a device the doctor uses from the turbo he heard the whine from the heat shield.. OK has anyone every fixed it.. from whine to no whine?? The whine from the first video is not the whine I think people are talking about. or the second video.. its more like a dentist drill hight pitched and with no acceleration its silent no whine what soever.. i have looked to find a video with a turbo whining and i can't find one that sounds like a dentist drill
Last edited by Mr_mundo; Mar 19, 2020 at 10:56 PM.
Newbie
Joined: Sep 2024
Posts: 3
Likes: 1
MBWorld Fanatic!
Joined: Sep 2013
Posts: 2,346
Likes: 691
2021 GLB250 FWD, 2023 GLA250 FWD, 2013 C250, 2015 GLK350, 2005 ML350SE, 2003 E320
FYI-
Not to be critical, but your comments may be blowing in the wind.
The OP says she’s a girl, doesn’t know much about cars, and hasn’t been back in almost 8 years.
Not to be critical, but your comments may be blowing in the wind.
The OP says she’s a girl, doesn’t know much about cars, and hasn’t been back in almost 8 years.
Newbie
Joined: Apr 2020
Posts: 3
Likes: 0
W212
I want to leave a message here in case anyone may want use my case as reference. My case was due to a bad balance shaft , a problem that i have never heard of in my life.
I have a 15 year old w212 CGI E200 with a M274 engine, the engine developed whining sound, and intermittent rattling noise when decelerating , usually from high speed decelerate to about 40km/h, the rattle will appear for a 1 or 2 second. The rattling sounded like marbles hitting within the engine block, or a frequency of an airramp.
I tried fixing it many times but to mo avail, from replacing tensional, drive chain propeller shaft bearing, engine mounts etc, nothing fix the problem. I even overhauled the engine, replacing cam lifters etc etc, but to no avail. The problem has caused engine fault message, damage a cam gear etc. One fine day a mechanic told me he was very sure the problem was caused by a bad balance shaft. Thanks goodness, true enough, the problem was resolved by replacing the balance shaft .
Word of caution, a new balance shaft can set one back by U$4k , but to me, more importantly, it solves the problem.
I have a 15 year old w212 CGI E200 with a M274 engine, the engine developed whining sound, and intermittent rattling noise when decelerating , usually from high speed decelerate to about 40km/h, the rattle will appear for a 1 or 2 second. The rattling sounded like marbles hitting within the engine block, or a frequency of an airramp.
I tried fixing it many times but to mo avail, from replacing tensional, drive chain propeller shaft bearing, engine mounts etc, nothing fix the problem. I even overhauled the engine, replacing cam lifters etc etc, but to no avail. The problem has caused engine fault message, damage a cam gear etc. One fine day a mechanic told me he was very sure the problem was caused by a bad balance shaft. Thanks goodness, true enough, the problem was resolved by replacing the balance shaft .
Word of caution, a new balance shaft can set one back by U$4k , but to me, more importantly, it solves the problem.
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
