help: fan noise

shahedC · 06-19-2008

hey guys,

everytime i post something here, I always get a quick response..

so here goes...

when I turn on the fan inside the car, I hear a rattling sound, as if the fan is just getting old and out of alignment or something.

thoughts?

maybe i should get it checked out at the dealership's service center.

thanks,
~shahedc
.

livefreeordie · 06-20-2008

Not sure what model you have but you may want to pull the cabin filter and check for anything unusual. I had this problem some time ago and found some leaves and pine needles in the fan unit, made a hell of a noise and i thought i needed a new fan unit.

shahedC · 06-20-2008

I have an R171, a 2007 SLK350 to be exact. Took delivery in Oct 2006.

Could you please clarify what the "cabin filter" is? Or provide a picture, and drawn an arrow pointing to it?

Thanks,
~shahedc
.

livefreeordie · 06-20-2008

Not sure where its located in the 350 but it filters the cabin air much like the filter in a central air unit in a house. Allot of time leaves and stuff make there way into the duck work and into the fan unit. On the 230's its located under the glove box, your manual should give you the location or someone with more knowledge of the 350's will chime in.

**richard_leeds** · 06-20-2008

Quote:

Originally Posted by shahedC

everytime i post something here, I always get a quick response..

.

An amzing co-incidence, the same happened to me this morning. I came into work itching to ask for help on here because we're going away for a weekend in the Dales straight from work.

Th enoise started on the way to work. We didn't have enough time to turn back home to swap for the sensible saloon, so were stuck with the noise all weekend. It stops when the climate control fan is turned off. Thankfully the weather isn't too hot or cold, so we'll be OK with it turned off for the weekend, but it would be really nice to fix it while we're away.

Any more tips on getting to the filter will be appreciated, will I need tools?

**etyu** · 06-20-2008

Quote:

Originally Posted by shahedC

I have an R171, a 2007 SLK350 to be exact. Took delivery in Oct 2006.

Could you please clarify what the "cabin filter" is? Or provide a picture, and drawn an arrow pointing to it?

Thanks,
~shahedc
.

Quote:

Originally Posted by richard_leeds

An amzing co-incidence, the same happened to me this morning. I came into work itching to ask for help on here because we're going away for a weekend in the Dales straight from work.

Th enoise started on the way to work. We didn't have enough time to turn back home to swap for the sensible saloon, so were stuck with the noise all weekend. It stops when the climate control fan is turned off. Thankfully the weather isn't too hot or cold, so we'll be OK with it turned off for the weekend, but it would be really nice to fix it while we're away.

Any more tips on getting to the filter will be appreciated, will I need tools?

Link to cabin air filter change: http://www.slkworld.com/slk-r171-gen...placement.html

May I suggest that you post this query in the ask Dan (premium) section. I am not sure if it is the cabin filter or the fan itself that maybe causing the noise. One may be able to get a glimpse of the "fan blades" by removing the battery compartment cover and see if there's any obstruction or malalignment when the cabin fan is turned on. The fan blades can be observed in the compartment aft of the battery,through a rectanguar opening.

**richard_leeds** · 06-22-2008

Quote:

Originally Posted by etyu

One may be able to get a glimpse of the "fan blades" by removing the battery compartment cover and see if there's any obstruction or malalignment when the cabin fan is turned on. The fan blades can be observed in the compartment aft of the battery,through a rectanguar opening.

That fixed it. Took battery cover off, reached into fan chmaber and slowly turned it by finger until I got to a point where a small leaf was stuck between the blades. Will post pics later.

Made sure the ignition was off (keys in my pocket) before I stuck my hand in the fan!

I'm suprised there's not a mesh screen to stop debris entering the fan. Maybe one for a future project.

**etyu** · 06-22-2008

Quote:

Originally Posted by richard_leeds

That fixed it. Took battery cover off, reached into fan chmaber and slowly turned it by finger until I got to a point where a small leaf was stuck between the blades. Will post pics later.

Made sure the ignition was off (keys in my pocket) before I stuck my hand in the fan!

I'm suprised there's not a mesh screen to stop debris entering the fan. Maybe one for a future project.

Glad it got sorted.

shahedC · 06-25-2008

thanks for all the info!

**richard_leeds** · 06-27-2008

Here are the pictures.

Undo the battery cover using three locking keys here, turn through 90 degrees.

This is the inside of the fan housing

Reach in and turn the fan with your fingers - make sure the key is in your pocket so there is no chance of the fan switching on!

Here is the culprit ...

**SLKCop** · 06-28-2008

I've got the same thing going on with my 2002 SLK. Guess I need to find out how to access the fan on mine now. Probably a leaf also, since I've got about 20 oak trees around my house!

shahedC · 07-03-2008

oh that looks less complicated, and is in a different area.. since you have an 05, that should be the same as my 07...

Quote:

Originally Posted by richard_leeds

Here are the pictures.

Undo the battery cover using three locking keys here, turn through 90 degrees.

This is the inside of the fan housing

Reach in and turn the fan with your fingers - make sure the key is in your pocket so there is no chance of the fan switching on!

Here is the culprit ...

**etyu** · 07-03-2008

Quote:

Originally Posted by shahedC

oh that looks less complicated, and is in a different area.. since you have an 05, that should be the same as my 07...

Richardleeds has the right-hand-drive (RHD) vehicle so it's on the left side of his vehicle. It will be on the right side of the R171 in a US spec vehicle (left-hand-drive or LHD).

**richard_leeds** · 07-04-2008

Quote:

Originally Posted by etyu

Richardleeds has the right-hand-drive (RHD) vehicle so it's on the left side of his vehicle. It will be on the right side of the R171 in a US spec vehicle (left-hand-drive or LHD).

Good point. It's on the passenger side, wherever you are in the world.

Quote:

Originally Posted by shahedC

oh that looks less complicated, and is in a different area.. since you have an 05, that should be the same as my 07...

Its a different part of the same system. My pictures show how to get to the fan intake from under the bonnet (hood). It doesn't need any tools and is the first place for debris to cause a problem.

The links at the top of the thread are for getting to the other side of the fan from the inside. This is how you can remove debris that has passed through the fan blades and is caught between the fan and the cabin filter. Requires tools, patience and draught strips!

06-19-2008	#1 (permalink)
shahedC SLK World Member Join Date: Oct 2006 Location: Washington DC Vehicle: 2007 SLK350 Posts: 85 Country: Thanks: 1 Thanked 3 Times in 3 Posts	help: fan noise hey guys, everytime i post something here, I always get a quick response.. so here goes... when I turn on the fan inside the car, I hear a rattling sound, as if the fan is just getting old and out of alignment or something. thoughts? maybe i should get it checked out at the dealership's service center. thanks, ~shahedc .

06-28-2008	#11 (permalink)
SLKCop Click it or Ticket! Join Date: Mar 2008 Location: Burleson, Texas Vehicle: Black/Black 2002 SLK-230 Kompressor [6MT] Other Toys: 2007 Toyota Tundra Posts: 369 Country: Thanks: 85 Thanked 103 Times in 58 Posts	I've got the same thing going on with my 2002 SLK. Guess I need to find out how to access the fan on mine now. Probably a leaf also, since I've got about 20 oak trees around my house! __________________ Mike 2002 Black SLK-230 To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts. To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts. To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts.

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06-20-2008	#2 (permalink)
livefreeordie Senior SLK World Member Join Date: Oct 2007 Location: Rochester,NH Vehicle: 2002 slk230K 2008 Honda CRV Posts: 154 Country: Thanks: 0 Thanked 9 Times in 9 Posts	Not sure what model you have but you may want to pull the cabin filter and check for anything unusual. I had this problem some time ago and found some leaves and pine needles in the fan unit, made a hell of a noise and i thought i needed a new fan unit.

06-20-2008	#3 (permalink)
shahedC SLK World Member Join Date: Oct 2006 Location: Washington DC Vehicle: 2007 SLK350 Posts: 85 Country: Thanks: 1 Thanked 3 Times in 3 Posts	I have an R171, a 2007 SLK350 to be exact. Took delivery in Oct 2006. Could you please clarify what the "cabin filter" is? Or provide a picture, and drawn an arrow pointing to it? Thanks, ~shahedc .

06-20-2008	#4 (permalink)
livefreeordie Senior SLK World Member Join Date: Oct 2007 Location: Rochester,NH Vehicle: 2002 slk230K 2008 Honda CRV Posts: 154 Country: Thanks: 0 Thanked 9 Times in 9 Posts	Not sure where its located in the 350 but it filters the cabin air much like the filter in a central air unit in a house. Allot of time leaves and stuff make there way into the duck work and into the fan unit. On the 230's its located under the glove box, your manual should give you the location or someone with more knowledge of the 350's will chime in.

06-25-2008	#9 (permalink)
shahedC SLK World Member Join Date: Oct 2006 Location: Washington DC Vehicle: 2007 SLK350 Posts: 85 Country: Thanks: 1 Thanked 3 Times in 3 Posts	thanks for all the info!

06-27-2008	#10 (permalink)
richard_leeds Elite SLK World Member Join Date: Sep 2007 Location: Leeds, UK Vehicle: 05 350 Posts: 203 Country: Thanks: 12 Thanked 10 Times in 7 Posts	Here are the pictures. Undo the battery cover using three locking keys here, turn through 90 degrees. This is the inside of the fan housing Reach in and turn the fan with your fingers - make sure the key is in your pocket so there is no chance of the fan switching on! Here is the culprit ...

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