2004 C320 4Matic lifter noise? - Mercedes-Benz Forum

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post #1 of 3 (permalink) Old 09-24-2012, 08:31 PM Thread Starter
BenzWorld Junior Member
Date registered: Sep 2012
Vehicle: 2004 Mercedes C320 4Matic
Location: Colfax, WI
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2004 C320 4Matic lifter noise?

I just bought a C320 4Matic with 90,000 miles on it. I noticed a ticking noise at idle. It gets faster as you accelerate and stays regardless of engine temperature. It sounds very much like a sticky lifter but does not go away. It is very noticeable but I would not consider it a knock so much as a tick.

Shortly after leaving the dealership (3 hour drive at 70mph) I slowed to about 35 mph. Just as I slowed the check engine light came on. I did fill up with premium (91 octane) fuel and was very careful about tightening the fuel cap. I tried starting the engine 4 times in a row as stated in the manual but the light remains on. I'm wondering if this could be related to the ticking noise.

The other thing I noticed was a considerable amount of road noise. Seems like a whirring noise from wheel bearings but I've never owned an AWD vehicle before so I'm wondering if the drivetrain is just going to be that lound.

Thanks in advance!
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post #2 of 3 (permalink) Old 09-24-2012, 09:59 PM
Date registered: Jul 2005
Vehicle: 99 ML430, 00 ML320, 05 E500 4matic Wagon
Location: WI
Posts: 20,086
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Depending on the year I would post it the corect forum instead of General Mercedes.
You either have a 2001-2006 or a 2007 and later.
We have forums for each and the members in them can tell you a lot more.

I can tell having owned a MB with that engine it never ticked well past 140k miles.
Having driven C320s of both generations the 4matic never added noticeable noise.
Bad bearings, tires or drive shafts have produced noise on 4matics and RWD cars.
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post #3 of 3 (permalink) Old 09-24-2012, 10:32 PM
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Date registered: Mar 2005
Vehicle: '01-E320 & 02-ST2
Location: John 15:18-19
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Welcome. Please take a minute to click user cp and edit details so you can add your vehicle and location to your profile, that's often useful information when you're seeking assistance.

Also, please note that you have a W203 model, and there is a forum specific to it, so cruise down the main forum page until you see it (under the sedans section). This general forum is just that, general things of interest across various vehicle lines.

The ticking could be something or not, but trying to diagnose a noise on the internet is pretty tough. You can buy a mechanic's stethoscope and that will help isolate it.

The CEL could be scores of things; that's why they make code readers. If you're not in CA, you can get them read at Autozone or you can buy a basic code reader on Amazon for under $25 (so long as you live in the US). Once you have the codes, that will tell you why the CEL is on and will also point you to the fix.

Good luck.

Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy; its inherent virtue is the equal sharing of misery. (Winston Churchill)

Last edited by Check Codes; 09-24-2012 at 10:57 PM.
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