W205 Accelerating Noise help

[JamesPGUK]

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Strange noise coming from footwell / right side engine area when accelerating. Any ideas on what to check? 7g box 2015 changes gear smoothly.

When does the gearbox need servicing?

 

[Gazwould]

Previous facelift W204 model was
5 years / 77, 500 so the same ?

 

[JamesPGUK]

My car is Dec 2015. Only just started making the noise. Like a kid blowing a raspberry in the footwell.

NOX sensor was replaced recently so wondering if something was not put back right.

Not sure when to service gearbox, done 57k?

 

[JamesPGUK]

Hi any one any ideas it’s driving me crazy. Think it could be related to changing NOX sensor.

 

[gIzzE]

Not sure on noise, but if it happened after NOX sensor fitted I would be checking it in properly.

Gearbox is 38k miles on the newer ones I believe.

 

[JamesPGUK]

Hi, merc want diagnostic fee for looking at it, said it can’t be anything to do with NOX sensor being replaced.

On the gearbox apparently it’s life / 100k which seems a lot before a service. 2015 merc estate mag premium plus c220 7 speed.

 

[JamesPGUK]

Who’s best person on the site to contact about the cabin noise coming from the engine. Starting to get worried

 

[raspy]

Hi, merc want diagnostic fee for looking at it, said it can’t be anything to do with NOX sensor being replaced.

On the gearbox apparently it’s life / 100k which seems a lot before a service. 2015 merc estate mag premium plus c220 7 speed.

@JamesPGUK I watched the video, can't think what's causing it. I would suggest getting the noise checked out, for peace of mind. When it comes to MB diagnostic costs, I've found that the price varies between dealerships considerably. For example, in London suburbs it's 202 quid, but 8 miles further in Hertfordshire, another MB dealer is offering for 75 quid.

 

[Sheffield Col]

Hi, did this get sorted ?

 

[JamesPGUK]

Hi, no not yet. Do you have same issue?

 

[JamesPGUK]

Checked boot at bottom of steering column and it looks secure. No idea what the noise could be.

 

[JamesPGUK]

Hi, did this get sorted ?

No not yet, Checked boot at bottom of steering column and it looks secure. No idea what the noise could be.

 

[Sheffield Col]

Hi, no not yet. Do you have same issue?

Hi, it's hard to tell but the noise does sound similar, but I only get it on occasions it's very random at the moment. I've not heard it for almost a week now.

 

[Rubb3rduck3d]

Hi there, was a solution/answer ever found to this issue?
Having the exact same noise.

 

[JamesPGUK]

Hi there, was a solution/answer ever found to this issue?
Having the exact same noise.

Hi, 2 things out of all the messages that stand out. Bottom of steering rack in footwell or where Ecu wires come into the cabin rubber comes off. Have another post on this forum same topic.

 

[Rubb3rduck3d]

Hi, 2 things out of all the messages that stand out. Bottom of steering rack in footwell or where Ecu wires come into the cabin rubber comes off. Have another post on this forum same topic.

I was given a similar suggestion which prompt me to pull out the carpet and check all the seals and plugs. annoyingly they were all solid and firmly in place which leads me to believe it’s something defiantly mechanical

 

[Merco34]

Have a good look under the car...particulary so If there is anything that has been snagged on an undertray....
Also check exhaust mounts engine mounts, sway bar etc.
Does it only make this noise on acceleration? If so check all intercooler pipes arent leaking.
Their was a recall if I remember on a sterring boot that makes a noise when you turn wheel.

Check ad report back

 

[Rubb3rduck3d]

Acceleration Noise please help | Engine

Hi all, need some help if possible! Been going mad trying to figure this one out.... Car has developed a low Pitched rattling/grating noise at around the 2k/2500k Rpm mark, it’s in all gears and distinctively louder when applying the gas! I have exhausted all options, I’ve taken it to 3 Indys...

forums.mbclub.co.uk

Found out, paid for STAR Diagnosis - no errors, it’s the bypass valve in the turbo housing, not critical to running of the car but it sounds awful at its metal on metal

 

[Mattmerc205]

Acceleration Noise please help | Engine

Hi all, need some help if possible! Been going mad trying to figure this one out.... Car has developed a low Pitched rattling/grating noise at around the 2k/2500k Rpm mark, it’s in all gears and distinctively louder when applying the gas! I have exhausted all options, I’ve taken it to 3 Indys...

forums.mbclub.co.uk

Found out, paid for STAR Diagnosis - no errors, it’s the bypass valve in the turbo housing, not critical to running of the car but it sounds awful at its metal on metal

Hi mate, did you get this replaced? What was the cost? I’m having the same sound/issue just started the other day when accelerating, it’s very irritating

 

[Rubb3rduck3d]

Fix found, had vehicle repaired today and the noise is gone.