gsrjc

UPDATED - head tech found the problem. The seal in the heater box needed to be replaced. So they put a new seal in the heater box (I guess heats the air that comes into the heating system???) and noise is gone so if anyone else is having this wind noise problem, ask the dealership to check on this seal. Part had to be ordered and car should be good tomorrow.

Information from service report:
CONFIRM CUST COMPLAINT, FOUND WHISTLING NOISE FROM CAR AT HIGHWAY
SPEEDS, PERFORM EXTENSIVE TEST DRIVE, APPLIED TAPE TO ELIMINATE NOISE
FROM WINDOWS OR SUNROOF, R/R WIPER COWLING, FOUND NOISE WOULD GO AWAY
WHEN TAPE WAS APPLIED OVER AIR INTAKE FOR OUTSIDE ON HEATER BOX, R/R
GLOVE BOX, FOUND NOISE COMING FROM SEAM ON HEATER BOX, SEAM WAS
CAUSING WHISTLING NOISE WHEN OUTSIDE AIR WOULD ENTER BOX AT HIGHWAY
SPEEDS, DRAIN COOLANT, EVAC AR/C SYSTEM, R/R DASH AND DASH SUPPORT,

R/R AND A/C HEATER BOX, USED BUTTLECORD TO SEAL A/C BOX, REINSTALL A/C
BOX, RECHARGE A/C SYSTEM, CORRECT COOLANT LEVEL, RETEST DROVE AFTER
REPAIR, FOUND WHISTLE WAS ELIMINATED, CLEAR CODES, ALL O.K NOW.

MBGLK

I'm having this exact same problem at ~60MPH and was wondering if anyone else has gone through this?

Also, gsrjc, did the heater box seal fix work for good or were there any updates? I want to suggest it as a fix when I take mine in.

Thanks.

mac jones

I'm having this problem on a E350 2011. 60-70mph whistling, whining noise. Slight but annoying. It also varies slightly with temp (slightly).

Apparently, you can troubleshoot this by taping zones until you narrow it down. I guess this is how the techs do it ; and they seemed to have solved that fellows issues in post above. My guess mine is something like that.

I'm going to tape off the areas myself. This way, I might be able to save some time (i'd hate to complain about something like this, as the sound is not loud; just annoying as hell )

I'll post my fix, if ever it's fixed, here. Even though the car is not the same, it's probably related.

MBRedux

That's worse than I thought. A foam seal around a damper door stuck open is what we normally find, especially if the door is vacuum activated and doesn't close completely over time. But to have the actual heater box separate at the seam must mean that it is made from cheaper plastic that cannot withstand the temperatures generated in the heat exchanger, thus distorting the box and opening the seam/seal all along the joint.

Glad it's fixed.

By the way, do you know your post is over in China? http://club.autohome.com.cn/bbs/thre...1.html?owner=1

ble2716

^ with i know what they are talking about.

Good or bad the GLK.

jc00210

I took my GLK in on Saturday they took out the heater box and the seal was separating and bent. MBUSA is Ordering new heater box will install Wednesday. I'll keep you all posted on Noise. Im not happy with a new car going to service already.

gsrjc

wow... seal was separated and bent on a new GLK... crazy. my service department gave me the 2 year free service deal to keep me happy so I haven't had to pay for any service A or B yet. Then again, my GLK was my 5th car purchase from them so maybe they did it so they wouldn't lose me as a customer. I'd ask your dealer to do the same since you have been inconvenienced for not being able to enjoy your new car.

jc00210

I think Ill ask for sure. I love the car I just can not believe my luck. It seems any car I buy has some problem. From Acura, Jeep , and now Mercedes. I expected better from such a iconic company. Hopefully it's the last of my troubles.

jc00210

So after all these years no more noise after they fixed the seal on your GLK. I hope they don't say it's my window seal next Ill be upset.

gsrjc

correct... after all these years, no more noise after they fixed the seal.

jc00210

So I take the car in today and they replace the entire heater box. I test drive car noise still there. They will keep car to place a felt seal around rubber seal MBUSA just released a fix. Funny thing is the Glk loaner they gave me makes no noise LOL. My luck is bad!!!!!

gsrjc

My dealer had to order stuff from Germany so they kept my car for a couple of weeks and that's when I complained and got the two year free service.

jc00210

WOW couple of weeks thats crazy. Good thing they gave you the extension. Well I just got my car back today so far no noise at all. Perfectly quite Im happy because I was getting worried. I guess the felt they placed around seal worked. Now the bad news my car only has 342 miles and my wife already has a small nail in tire. My bad luck continues. I took out nail at tire shop no patch needed it looks at if it stayed in the upper tread. I guess Ill find out tomorrow morning when I wash the car if my tire is flat.

ble2716

Glad you have that noise fixed.
I know it could be very annoying.
Thanks for keeping us updated.

mac jones

Could you elaborate a bit on this? I have a noise that seems to fit this, and I need as much info as I can get before I bring it in. It's a little embarrassing (noise issues) as they could get an attitude I suppose, considering that it's so hard to pin down. If they where to try to ignore this, it would be unfortunate (for them)

Did you finally get rid of the noise?

yaester40

I noticed load noise at high speed when driving my new GLK 350, and reported it in J.D. Power new owner survey in 2011. But, I did not discuss it w/ the dealer. Thanks to the forum, I will take the issue to my dealer.

GLKDC

Has anyone noticed a whistling noise above 50-60 MPH on the highway? Can't tell where it's starting from, but it's not the sunroof. Any ideas? I got a brand new 2012 with 15 miles on it when I noticed.

jc00210

Provide them with the following update posted above. I made a copy and gave it to the dealer. Also make the service team ride with you. There is no denying a noise if you are in the car with them. MBUSA just put out a update and they are fixing the GLK with a felt strip around the heater box and it resolves the noise issues.

jc00210

Yes the noise has been corrected felt placed around heater box seal.

Venoms

I have a 2010 had nothing but trouble with mine crack rim broken set tracks car been making wind noise from day one they don't want to fix nothing I went to every benzs delir in the south bay I am going to try Torrance benzs to see what they say about the wind noise

jc00210

That's crazy call Mercedes national line and tell them that there is a service call for the heater box and your dealer does not have the update yet.

bohdy

hello, what heating box do you mean? under the hood is a removable box above the battery. do you mean exactly the part that is removed or the part that is firmly attached to the car? some photos would be good for an idea of ​​which part is to be sealed, or where it is necessary to apply a seal.

Mmr1

It’s under the dash, he did say remove the dash and remove ac and cooling fluid . A big expensive job

Odd Piggy

Gsrjc hasn’t been back since 2015 according to stats, so getting an answer is unlikely. Last production of GLK (X204) was in 2015 so it’s also unlikely Mercedes will do anything about wind noise.

On an older car, the likely causes of wind noise are door seals, seals around mirrors and windows, gaps in windshield seal, sun roof seals.