SLK 280 - noise from rear window / deflector. - Mercedes Benz SLK Forum

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#1 Old 05-29-2009
 
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SLK 280 - noise from rear window / deflector.

Hello,

I was just wondering if anyone could put my mind at rest by telling me what I am experiencing is normal. I am new to the SLK and have a 57 (UK) registration 280. As the sun has really started coming out recently, I have had the top down quite a lot... it's only since then that I've noticed that the rear window / wind deflector thing (the thing that you can remove by pressing the two buttons on the rear posts) makes quite a bit of noise when pootling around...

It's a kind of rubbing / jarring noise... most noticeable when I go over bumps or speed bumps (hate 'em)... but, that means it does it quite a lot of the time, to be honest, as a lot of our roads in the UK are a bit bumpy.

I've took a look at the deflector thing, pulled it out, then put it back in in an effort to ensure it was well seated - it's as good as it can get I think. Still get the noise... is that normal? It doesn't look exactly flush at the joins to be honest, but it's definitely well in where it is supposed to be.

The other issue was what I experienced on the M1 the other day - I'm not sure most people drive on the motorway with the top down, but I tried it and kept at around 80mph (or so)... I had this fluttering noise coming from the same area and it worried me a little bit.

At first I wondered if it was just the air going through the gaps, but what I think it is is the whole window thing being stressed backwards and forwards with the wind speed... I did notice there is no support or connection in the middle of the window - just at each side.

I don't think there's anything wrong, as such, but it would be nice for someone else with the same car to just let me know this is normal.

Or do most people remove that rear window..? Is that advisable at all?

Cheers, DpM
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#2 Old 05-29-2009
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I haven't noticed any noise when going over bumps, but I could certainly understand if it did. What with all the twisting of the car body when going over bumps, it is somewhat surprising that it doesn't make noise all the time. But I haven't heard any.

I DO see the plastic flexing rhythmically at speed.

One thing to check is that it is in the proper direction. I think there are pictures elsewhere on the site that have shown how it goes in (or maybe it was just discussed or maybe it was on another forum). But I suppose if it were in backwards, maybe it would make more noise.
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#3 Old 05-29-2009
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Welcome from Valrico, Florida!
And welcome to this great forum!

Sounds like you have the oem clear plastic windscreen since you mentioned pushing buttons. have you a picture?

even though i have an 09 now, on my 05 slk 350, it made noise also until i used some sort of dressing on the roll bars. you might try that to eliminate that rubbing noise over bumps, etc

and as mtiede mentioned, the buttons go on the inside and not the outside.

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#4 Old 05-29-2009
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Sounds like a loose OEM rear Lexan draught stop.

The triangles (w mesh) are inserted from the rear of the vehicle and not from the cabin/cockpit side. The Lexan draught stop or windschott is inserted downwards with the release buttons facing the cabin (smooth side facing rear of vehicle).

I haven't noticed any sound when going over bumps or uneven surface. It is quite stable even near 100 mph and my OEM rear Lexan windscreen is about 3 years old.

Eddy



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#5 Old 06-01-2009
 
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Good call. I believe it's on backwards.

It does look rather ill-fitting...





As it came to me like that, I can not feel foolish - I can feel clever 'cos I spotted it (or was bright enough to ask about it!). I wonder if that is the reason for the noises.

I tried pulling it apart just now... I must admit - common-sense says it should go the way it is... it feels like it would blow off if you insert the triangles with mesh from the back and then insert the perspex window. The short side of the plastic would then be at the front.

So - from the images, and as it is now, I need to pull out the window, swap over the meshes from left to right and put the window in the opposite way round so the buttons are at the front.

Cheers, DpM
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#6 Old 06-01-2009
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meshes go in from the back. the screen has the buttons inside the car.
Attached Images
File Type: jpg windscreen1.jpg (29.8 KB, 24 views)
File Type: jpg windscreen2.jpg (33.4 KB, 13 views)
File Type: jpg windscreen3.jpg (34.3 KB, 10 views)
File Type: jpg windscreen4.jpg (29.7 KB, 15 views)
File Type: jpg windscreen5.jpg (26.9 KB, 15 views)


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#7 Old 06-01-2009
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So is it quieter now or has having in backwards made it not fit as tight now?
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#8 Old 06-02-2009
 
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Swapped 'em around this morning before doing the normal commute - silence. Fantastic. Being one of those pernickerty people who hates unidentifiable noises in the car, I am now really pleased. I even intentionally drove over some speed bumps just to make sure... I even muted the radio... silence is golden, golden!

Thanks a lot!

Cheers, DpM
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