.
Strange noise from engine, problem?
Thread Starter
Junior Member
Joined: Oct 2009
Posts: 23
Likes: 0
2007 C280 4Matic
Strange noise from engine, problem?
Hello guys, I recently purchased a 2007 c280 with 35k miles and I've been reading on these forums since and cannot stop! We used to drive a ford before until it finally gave out, then we decided to get something else. Ive never been so interested in cars before but after I started driving the benz, it all changed. I have so many questions about upgrades, mods, detailing, etc. but the most pressing is this one.
When I am driving the car, I start hearing some tapping noise from the engine. It doesn't happen right away but it always occurs after about 5 minutes of driving. I will include a link below to a recording of it because I don't know how to accurately describe it.
http://dl.dropbox.com/u/245810/c280noise.mp3
I recorded that after driving around for an hour or so, you can clearly hear it towards the end of the clip. If anyone has heard or experienced this before, please let me know and what you did to resolve it. I personally dont think that the engine is suppose to sound like that but let me know what you guys think. BTW, the AC was off, nothing else turned on. Again, I really am a beginner when it comes to knowing cars inside and out, but I am well on my way to learning.
Also, there are other things that I am noticing. When I have my foot on the pedal and I release it, the car should slowly decelerate. For some reason, when I am driving the c280, it feels like I have my foot lightly on the brake. It tends to slow down faster, ironically. I notice the difference so much when I drive the benz as compared to when I drive my brothers car. Again, I dont know if this is normal, or a possible issue. Could it be related to the engine noise?
Any input is appreciated.
Thanks guys, this forum has been great.
When I am driving the car, I start hearing some tapping noise from the engine. It doesn't happen right away but it always occurs after about 5 minutes of driving. I will include a link below to a recording of it because I don't know how to accurately describe it.
http://dl.dropbox.com/u/245810/c280noise.mp3
I recorded that after driving around for an hour or so, you can clearly hear it towards the end of the clip. If anyone has heard or experienced this before, please let me know and what you did to resolve it. I personally dont think that the engine is suppose to sound like that but let me know what you guys think. BTW, the AC was off, nothing else turned on. Again, I really am a beginner when it comes to knowing cars inside and out, but I am well on my way to learning.
Also, there are other things that I am noticing. When I have my foot on the pedal and I release it, the car should slowly decelerate. For some reason, when I am driving the c280, it feels like I have my foot lightly on the brake. It tends to slow down faster, ironically. I notice the difference so much when I drive the benz as compared to when I drive my brothers car. Again, I dont know if this is normal, or a possible issue. Could it be related to the engine noise?
Any input is appreciated.
Thanks guys, this forum has been great.
MBWorld Fanatic!
Joined: Jul 2008
Posts: 8,384
Likes: 800
2019 G70 6MT & 2022 Ford Maverick XL
Oh I hear it there near the end of the recording. Something is definitely up with that, not a normal noise at all.
If it is a 2007, it should still be under warranty. Don't worry about it - let the dealer figure it out!
If it is a 2007, it should still be under warranty. Don't worry about it - let the dealer figure it out!
Trending Topics
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
MBWorld Fanatic!
Joined: Jul 2008
Posts: 8,384
Likes: 800
2019 G70 6MT & 2022 Ford Maverick XL
Laneshift - you have the M112 and his car is the M272. It's a completely different engine. I don't think what his is doing is even close to being a normal characteristic.
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 192
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Hello guys, I recently purchased a 2007 c280 with 35k miles and I've been reading on these forums since and cannot stop! We used to drive a ford before until it finally gave out, then we decided to get something else. Ive never been so interested in cars before but after I started driving the benz, it all changed. I have so many questions about upgrades, mods, detailing, etc. but the most pressing is this one.
When I am driving the car, I start hearing some tapping noise from the engine. It doesn't happen right away but it always occurs after about 5 minutes of driving. I will include a link below to a recording of it because I don't know how to accurately describe it.
http://dl.dropbox.com/u/245810/c280noise.mp3
I recorded that after driving around for an hour or so, you can clearly hear it towards the end of the clip. If anyone has heard or experienced this before, please let me know and what you did to resolve it. I personally dont think that the engine is suppose to sound like that but let me know what you guys think. BTW, the AC was off, nothing else turned on. Again, I really am a beginner when it comes to knowing cars inside and out, but I am well on my way to learning.
Also, there are other things that I am noticing. When I have my foot on the pedal and I release it, the car should slowly decelerate. For some reason, when I am driving the c280, it feels like I have my foot lightly on the brake. It tends to slow down faster, ironically. I notice the difference so much when I drive the benz as compared to when I drive my brothers car. Again, I dont know if this is normal, or a possible issue. Could it be related to the engine noise?
Any input is appreciated.
Thanks guys, this forum has been great.
When I am driving the car, I start hearing some tapping noise from the engine. It doesn't happen right away but it always occurs after about 5 minutes of driving. I will include a link below to a recording of it because I don't know how to accurately describe it.
http://dl.dropbox.com/u/245810/c280noise.mp3
I recorded that after driving around for an hour or so, you can clearly hear it towards the end of the clip. If anyone has heard or experienced this before, please let me know and what you did to resolve it. I personally dont think that the engine is suppose to sound like that but let me know what you guys think. BTW, the AC was off, nothing else turned on. Again, I really am a beginner when it comes to knowing cars inside and out, but I am well on my way to learning.
Also, there are other things that I am noticing. When I have my foot on the pedal and I release it, the car should slowly decelerate. For some reason, when I am driving the c280, it feels like I have my foot lightly on the brake. It tends to slow down faster, ironically. I notice the difference so much when I drive the benz as compared to when I drive my brothers car. Again, I dont know if this is normal, or a possible issue. Could it be related to the engine noise?
Any input is appreciated.
Thanks guys, this forum has been great.
When I listen to your clip it is extremely indestinct this end at full volume. It sounds as though the "knocking" sound is not related to engine RPM. Is this correct? If so it effects the diagnosis drastically - ie. it can't be a hydraulic lifter stuck, piston slap or a small end bearing if not RPM dependant. Please confirm if the noise is RPM related.
Last edited by Glyn M Ruck; Nov 21, 2009 at 10:12 PM.
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 192
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
The only difference between a 112 & 272 are the cylinder heads - Twin cams per head - Otherwise the engine is identical.
Thread Starter
Junior Member
Joined: Oct 2009
Posts: 23
Likes: 0
2007 C280 4Matic
I took it to the dealership in Astoria, Queens yesterday and the guy told me it was the MOT valve. He said it is entirely normal. Can you guys confirm this?
The noise seems to be somehow related to RPM. When the car is idle, the tapping is at a constant tempo. Once I start revving up, the tapping start to become faster until I cannot hear it anymore due to the engine being loud.
The noise seems to be somehow related to RPM. When the car is idle, the tapping is at a constant tempo. Once I start revving up, the tapping start to become faster until I cannot hear it anymore due to the engine being loud.
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 192
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
The purge valve on some cars can be noisy. Replace or mount it on rubber to shut it up. A kit is available.
