What's that noise? - Mercedes Benz SLK Forum

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#1 Old 03-25-2018
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What's that noise?

Key turned to 'accessories' (all dash lights on) prior to crank position, and there is a noticeable whirring and clicking sound, apparently from behind instrument cluster. Anyone happen to know what's going on?
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#2 Old 03-25-2018
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Car starts I assume?


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#3 Old 03-25-2018
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Quote:
Originally Posted by Terminal View Post
Key turned to 'accessories' (all dash lights on) prior to crank position, and there is a noticeable whirring and clicking sound, apparently from behind instrument cluster. Anyone happen to know what's going on?
Have you tried turning the interior fan to off and see if you still get the sound?

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#4 Old 03-25-2018
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^ - ^^

Yes and yes. I've noticed it plenty of times, but now curiosity has got the better of me.
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#5 Old 03-25-2018
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can u upload a video?


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#6 Old 03-25-2018
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^

I think that will be above my pay-grade

I was just wondering if other '55 owners would sit quiet and listen (radio off) next time they switch on.
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#7 Old 03-25-2018
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Quote:
Originally Posted by Terminal View Post
^

I think that will be above my pay-grade
you can use your phone to take a video
then i can give you my email and i can upload it 4 u

let me know


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#8 Old 03-25-2018
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Quote:
Originally Posted by Terminal View Post
^

I think that will be above my pay-grade

I was just wondering if other '55 owners would sit quiet and listen (radio off) next time they switch on.
mine is quiet...i buckle my seat belt otherwise i get the reminder. that is all
without starting, i just get the systems coming on but no noise as you describe


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#9 Old 03-25-2018
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^ Hmmm....curious....
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#10 Old 03-25-2018
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Quote:
Originally Posted by Terminal View Post
^ Hmmm....curious....
take that phone video and i can send you my email address


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#11 Old 03-25-2018
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My 55 is a fl if that matters


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#12 Old 03-25-2018
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I have keyless go, when I push the button the car starts. However, if my foot is not on the brake – and I push the button – I hear a mechanical whirring noise as well. I believe it is the air conditioning vents moving into position.
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#13 Old 03-25-2018
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He has a r171 from 2005 Mensra


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#14 Old 03-25-2018
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Originally Posted by Terminal View Post
^ Hmmm....curious....

I know you know mercs.


Have you tried this once the roof is down?


I'm just wondering if the noise sounds like it comes from there, but is travelling from elsewhere.


Just been out in mine, but I'll go see what I get.


I thought fuel pump, but I know you'd spot that.

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#15 Old 03-25-2018
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I reckon it's all those hamsters under the bonnet scuttling about and putting on their special AMG trainers
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#16 Old 03-25-2018
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Owe you more than one for helping newbs with tech issues.


Soo...Ok.
Same country, year and model.


Same result, methinks.


I get just two clicks. You?


Details of what I did.
Stereo off.
Fan at lowest setting and off'd asap on turning key.
AC off.


Two distinct clicks.


Tried with roof down.
Same place.


I park in the road and it's night, so not playing with it.


I'd describe the click a little duller than the Hazards.
Low in the dash, maybe underneath.
Location between speedo and centre consul.


Whirring sound is low and I assume either ac charging or a fan.
Doesn't sound like a belt whirring to me.


That any help @Terminal
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#17 Old 03-26-2018
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^ Yes I tried making a vid, but it won't allow me to attach to email over 20mb...

In any case, the sound is nearly inaudible, but I think yours is the same. A relay clicking - tick-tock, (only doing it once today, not repeatedly), followed by a very faint whirring, like a laptop cooling fan, emanating from behind the dials....

A/C off and fan to minimum. I tried switching the fan on, and the sound is different and obviously includes airflow from the vents.

I think it's reasonable to hear a relay click before cranking engages, but the little cooling fan noise seems pointless.
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do the inlet manifold flaps cycle before crank on the 55 ? clicking sound.

not to sure

p.s Myk i am back thanks buddy
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#19 Old 03-26-2018
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^ Yes I tried making a vid, but it won't allow me to attach to email over 20mb...
Dropbox is an option for transfer of large files.

BUT use Divx free version Video Converter | Free Video Converter Download | DivX Converter | DivX.com to shrink the size.

It will reduce the size of your vid from 20 mb to TWO mb (roughly 1/10th the size) with very little loss of quality. Email that version.


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#20 Old 03-26-2018
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My 2014 SLK55 AMG also makes a little humming noise I can hear if I don't crank it and have the music off. I get no clicking sounds but I do hear a little whirring kind of hum and it doesn't stop until I exit the car (open the door) and everything turns off. (or if I crank it of course)
I have wondered what that is too. Next time I am at a MB dealer I'll try to remember to ask.
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