Wind noise even at low speed - Page 2 - PeachParts Mercedes-Benz Forum

latief · #16 10-21-2009, 03:21 PM

Update, so i learned that these pieces of tape are original. so back to square one....

I am starting to go into a new direction with this: ever since i acquired the car two months ago, the rear windows have not been working.they are close all the way up, but the motors don't work....maybe they are not seated up all the way? i will post pictures of my window seals so that you guys can see those too........just in case i am missing something....

this is driving me crazy !!!

EDIT: Never mind: I taped the rear windows with electric tape to eliminate any leaks, test drove..........no change......

I am so frustrated now, i think i need to look outside the cabin for noise sources.....

any ideas? i am out of them

jcyuhn · #17 10-21-2009, 04:24 PM

Let me ask a dumb question - are you sure it's wind noise? If so, why?

Have you tried getting the car up to speed and shifting to neutral, letting the engine idle? What happens.

How about having someone else drive the car while you ride in the passenger seat and back seat. You can move around to better identify the source of the noise.

Has the windshield ever been replaced?

latief · #18 10-21-2009, 04:55 PM

Quote:

Originally Posted by jcyuhn

Let me ask a dumb question - are you sure it's wind noise? If so, why?

Have you tried getting the car up to speed and shifting to neutral, letting the engine idle? What happens.

How about having someone else drive the car while you ride in the passenger seat and back seat. You can move around to better identify the source of the noise.

Has the windshield ever been replaced?

Not a dumb question at all, but i am very confident it is wind noise, it is a wooshing noise that sounds like a slightly open window......i did drive the car in neutral to eliminate engine noise, and it is not wheel bearing noise as i am familiar with that......

I don't think the windshield has been changed, but i only acquired it two months ago, so who knows? but the seals around the windshield seem to be perfect (unlike butchered ones after windshield replacement jobs)....

at this point, i am open for suggestions. maybe the heat shield under the car....? maybe window regulators not going up completely?...

Open for ideas,,,,,,

I will try to tape all the windows simultaneously and see what happens ....

babymog · #19 10-21-2009, 10:24 PM

I'm voting for windows not properly adjusted, too far forward or cocked slightly.

The tape on the rear door seals is so that the seal will slide when closing, prevents the rubber bulb-seal wearing through or bunching up. It is OE.

latief · #20 10-21-2009, 11:03 PM

Quote:

Originally Posted by babymog

I'm voting for windows not properly adjusted, too far forward or cocked slightly.

The tape on the rear door seals is so that the seal will slide when closing, prevents the rubber bulb-seal wearing through or bunching up. It is OE.

thanks,

so how can i check for a properly/improperly adjusted window? it seems fine

I appreciate the feedback....

Ferdman · #21 10-22-2009, 07:21 AM

latief, does your 300E still have the noise encapsulation panel under the engine? If that's missing, as happens on older cars, that could be a source of wind noise.

latief · #22 10-22-2009, 08:38 AM

no splash shield for me, yes engine and highway noise is high, but i can live with that...

this is wind gushing noise at head level in both front seats, with the driver side being worse....I will adjust door striker slightly to see if it achieves a better seal....

Cal Learner · #23 10-22-2009, 09:41 AM

You've done a lot of trial and error testing, so this may lead nowhere. But my thought is what babymog said below: a slightly cocked driver side window. Try this. Run the window up all the way closed. Then lightly tap the window switch down just enough to unseat the glass, but not to move it down at all. That would be just enough to un-cock it in the guide rails and align it properly. Could be the answer.

latief · #24 10-22-2009, 09:50 AM

Quote:

Originally Posted by Cal Learner

You've done a lot of trial and error testing, so this may lead nowhere. But my thought is what babymog said below: a slightly cocked driver side window. Try this. Run the window up all the way closed. Then lightly tap the window switch down just enough to unseat the glass, but not to move it down at all. That would be just enough to un-cock it in the guide rails and align it properly. Could be the answer.

I appreciate the feedback, I will give it a shot

Thanks

ps2cho · #25 10-22-2009, 10:03 AM

I am following this thread as my 260E has a lot more wind noise than my 300TE for some unknown reason.

latief · #26 10-22-2009, 10:05 AM

Quote:

Originally Posted by ps2cho

I am following this thread as my 260E has a lot more wind noise than my 300TE for some unknown reason.

If you can (do me a favor), post some pictures of your front doors up-close similar to my pictures, maybe there are some commonalities.....

I think it will eventually come down to door adjustments and new seals...

latief · #27 10-22-2009, 07:54 PM

I managed the adjust the doors slightly so that the corners are correct now. I only messed with the door striker, making the door close a bit higher (i am talking about barely a mm of adjustment). the doors now are flush and the corners are great. I experimented with those for a while making them even tighter so that the front doors are even more depressed than the rear ones. NO DIFFERENCE. The doors and door seals are not causing the issue. I am 100% sure about that.....i even put some rubber cleaning compound on the seals, and closed the door to see the imprint of the compound on the frame...everything seals correctly.....

so i got my wife to drive me around for a bit with me in the passenger seat. It seems that the air is escaping from the vertical part of the window of the two front doors. meaning, the vertical window edge closer to the rear of the door. at least, that is where the noise is coming from. and when i press hard on the window, it gets louder......???

so now i am even more confused:

1-if it is escaping with that kind of pressure, where is it coming in from ? the windshield? how can i tell if that has been changed ?

2-My front windows are really loose, with age, the you can feel them slap around as you close the door. could this be contributing to the problem?

3-I will remove the door panels soon, could the windows be tightened? or am i in for new regulators?

4-I remember seeing/ reading about a TSB relating to the 1993+ models, were the windshield leaks....anyone know about that?

thanks, ideas are needed at this point

ps2cho · #28 10-23-2009, 12:10 AM

I've gone through replacing all window motors on the W124 and regulators don't go bad. I see no reason for it. I've heard that the "black" bolt is the adjustment for the regulator. Maybe pull off the panel and make sure all the nuts+bolts are tight and the window is sitting correctly on the guide rails.

I'll take some pics for you tomorrow although based on what you said in the previous post, I think we probably have different problems.

locry · #29 10-23-2009, 01:45 AM

does your car come equipped with a sunroof?

Ferdman · #30 10-23-2009, 05:55 AM

It sounds like your window seals are the source of the wind noise. The windows shouldn't "slap around" when you shut the doors. My guess is that the window seals were modified when the tinting was done. I've read where the tinting film makes window operation balky so the previous owner or the installer may have trimmed the window seals creating a looser fit which results in wind noise.