Knocking Noise
Thread Starter
Super Member
Joined: Jul 2009
Posts: 743
Likes: 33
GLS450
Knocking Noise
I'm hearing a knocking noise from my front end. I hear it when proceeding from a stopped position just after pressing the gas pedal and once the car has been running for a while. I have a 2007 E350 Sport with 35k.
Any ideas?
Any ideas?
Senior Member
Joined: Mar 2010
Posts: 451
Likes: 44
2007 E350; 2018 GLE350
Can you give us a few more clues? Is it related to engine speed, or car speed, or left turns, right turns, accelerating, braking, a/c on/off, pedestrian being dragged beneath the car, etc?
Thread Starter
Super Member
Joined: Jul 2009
Posts: 743
Likes: 33
GLS450
I hear it when proceeding from a stopped position just after pressing the gas pedal. It appears once the car has been running for an hour or more, a/c on, beneath the car towards the front.
MBWorld Fanatic!
Joined: Mar 2004
Posts: 5,017
Likes: 16
From: Ft. Lauderdale Area, USA
2015 ML 350
Thread Starter
Super Member
Joined: Jul 2009
Posts: 743
Likes: 33
GLS450
One single knock. Yesterday as I pulled into my driveway I noticed the same knock as my wife got out of the car so I started checking the front end thinking maybe shock or strut. I pushed up and down, rocked and nothing. I then sat on the passenger side and I heard the same knock once but was not able to recreate it again. This morning it was fine initially but after 30/40 minutes I started to notice the knocking after accelerating from a stopped position.
Junior Member
Joined: Oct 2005
Posts: 30
Likes: 0
From: Minnesota
1998 E430 Sport and 2003 E500
jerome... Is the car knocking under acceleration (i.e. motor) or is it suspension (when you are on a bumpy road or enter or leave the driveway)? Looks like low miles to be the issue, but could be sway/torsion arm bushing in the front.
Does the car vibrate or shake or rumble/hum under cruising conditions? Does it knock when you rev the motor at a standstill?
Need details
Does the car vibrate or shake or rumble/hum under cruising conditions? Does it knock when you rev the motor at a standstill?
Need details
Thread Starter
Super Member
Joined: Jul 2009
Posts: 743
Likes: 33
GLS450
jerome... Is the car knocking under acceleration (i.e. motor) or is it suspension (when you are on a bumpy road or enter or leave the driveway)? Looks like low miles to be the issue, but could be sway/torsion arm bushing in the front.
Does the car vibrate or shake or rumble/hum under cruising conditions? Does it knock when you rev the motor at a standstill?
Need details
Does the car vibrate or shake or rumble/hum under cruising conditions? Does it knock when you rev the motor at a standstill?
Need details
I don't know whether it is the suspension or motor and it doesn't appear to make the noise on a bumpy road or entering or leaving the driveway. No vibrating, shaking or rumble/hum under cruising conditions or when I rev the engine at a standstill.
I will do more monitoring over the next day or so and provide my findings.
Last edited by jerome8283; Aug 14, 2010 at 09:24 AM.
Trending Topics
MB World Stories
The Best of Mercedes & AMG
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
Mercedes Teases Updated EQS With Steer-By-Wire and a Yoke
Verdad Gallardo
8 Mercedes Models With Poor Reliability Records
Verdad Gallardo
Magnificent New Mercedes-Maybach S-Class Revealed: 12 Things to Know
Verdad Gallardo
Thread Starter
Super Member
Joined: Jul 2009
Posts: 743
Likes: 33
GLS450
Member
Joined: May 2002
Posts: 192
Likes: 0
From: Florida
2007 E350/2001 SLK320
No Problem! Now if someone can just help me determine what the heck that rubbing/whirring noise is coming from the Left front wheel before I get out of warranty I will be a happy woman!
Stealership said tire noise (OE conti's) nope! Have had it to 3 different Benz Stealerships, and yet no one can determine what the noise is. it is constant as the car is driven, and after the relative quiet of a w210, this noisey rubbing sound encourages me leave this car in the garage 75% of the time. Even my husbands MY01 SLK is quieter...!
Stealership said tire noise (OE conti's) nope! Have had it to 3 different Benz Stealerships, and yet no one can determine what the noise is. it is constant as the car is driven, and after the relative quiet of a w210, this noisey rubbing sound encourages me leave this car in the garage 75% of the time. Even my husbands MY01 SLK is quieter...!
Thread Starter
Super Member
Joined: Jul 2009
Posts: 743
Likes: 33
GLS450
No Problem! Now if someone can just help me determine what the heck that rubbing/whirring noise is coming from the Left front wheel before I get out of warranty I will be a happy woman!
Stealership said tire noise (OE conti's) nope! Have had it to 3 different Benz Stealerships, and yet no one can determine what the noise is. it is constant as the car is driven, and after the relative quiet of a w210, this noisey rubbing sound encourages me leave this car in the garage 75% of the time. Even my husbands MY01 SLK is quieter...!
Stealership said tire noise (OE conti's) nope! Have had it to 3 different Benz Stealerships, and yet no one can determine what the noise is. it is constant as the car is driven, and after the relative quiet of a w210, this noisey rubbing sound encourages me leave this car in the garage 75% of the time. Even my husbands MY01 SLK is quieter...!
Also, with regard to the knocking noise, today I was able to reproduce this. At a standstill if I turn my wheel slightly in either direction I can hear the same knock. It's pretty consistent.
I will take the car to the stealership
as soon as I can. My warranty is nearing it's end in 2011 and I want to make sure these issues get addressed.
Newbie
Joined: Jul 2007
Posts: 1
Likes: 0
I have a 2010 E350 w/about 7000 miles on it, and I'm getting the knock sound in the driver's side front wheel area when going over bumps at any speed... roomor mentioned low miles may be an issue for jerome, and I'm curious if anyone else has any thoughts about this.
Thanks.
Thanks.
Thread Starter
Super Member
Joined: Jul 2009
Posts: 743
Likes: 33
GLS450
I have a 2010 E350 w/about 7000 miles on it, and I'm getting the knock sound in the driver's side front wheel area when going over bumps at any speed... roomor mentioned low miles may be an issue for jerome, and I'm curious if anyone else has any thoughts about this.
Thanks.
Thanks.
