ticking/knocking noise??
03-06-2014, 08:14 AM
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2012 E300 4Matic
ticking/knocking noise??
When I start my engine, after sitting in the cold for a while, there is a ticking or knocking noise that happens.
This goes away after 2 or 3 minutes.
Is this normal?
My engine is the 3.5L V6 with 248 hp.
This goes away after 2 or 3 minutes.
Is this normal?
My engine is the 3.5L V6 with 248 hp.
03-06-2014, 10:40 AM
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2010 E350 Luxury Sedan, Engine 272 (V6)
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Would definitely consult MB dealership and have it investigated. This would document when you brought it up in case it is something else. Could also be one of the other problems.
BTW, shouldn't the engine be 268 hp?
03-06-2014, 10:51 AM
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2012 E300 4Matic
Lot of people have brought this up and MB techs always say it is normal. Mine occasionally does it, but less than a minute, particularly after sitting for a couple of days. Seems longer, but it isn't.
Would definitely consult MB dealership and have it investigated. This would document when you brought it up in case it is something else. Could also be one of the other problems.
BTW, shouldn't the engine be 268 hp?
Would definitely consult MB dealership and have it investigated. This would document when you brought it up in case it is something else. Could also be one of the other problems.
BTW, shouldn't the engine be 268 hp?
The engine in the new for 2012 E300 is 248 hp.
pre-2012 E350 has 268 hp. and 2012+ E350 is 302 hp.
03-06-2014, 11:40 AM
#7
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All direct injection engines (not just MB) makes a click noise due to the high pressure injectors. There is a service bulletin about a loud rattle for a few seconds when you start the car after the engine is already warm and has been off for an hour or so. They will install a oil drain valve. My car is going in for this next month when they do the first A service.
If I let the engine warm up, then shut it off (let' say go to dinner or grocery shop then come back out) start it 45 minutes to an hour later, it will make a very loud rattle for about 5 seconds then go back to the normal ticking noise. On a few occasions its even shook the car pretty violently and then stalled (all within the first 5 to 10 seconds of starting).
So loud rattle for a few seconds is a known issue. If its a few minutes like you say, then maybe you should have the dealer take a look at it. Could be something more serious.
If I let the engine warm up, then shut it off (let' say go to dinner or grocery shop then come back out) start it 45 minutes to an hour later, it will make a very loud rattle for about 5 seconds then go back to the normal ticking noise. On a few occasions its even shook the car pretty violently and then stalled (all within the first 5 to 10 seconds of starting).
So loud rattle for a few seconds is a known issue. If its a few minutes like you say, then maybe you should have the dealer take a look at it. Could be something more serious.
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03-06-2014, 01:39 PM
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2013 E350 Wagon, prev 2005 ML 500 SE
service bulletin?
..... There is a service bulletin about a loud rattle for a few seconds when you start the car after the engine is already warm and has been off for an hour or so. They will install a oil drain valve. My car is going in for this next month when they do the first A service.
If I let the engine warm up, then shut it off (let' say go to dinner or grocery shop then come back out) start it 45 minutes to an hour later, it will make a very loud rattle for about 5 seconds then go back to the normal ticking noise. On a few occasions its even shook the car pretty violently and then stalled (all within the first 5 to 10 seconds of starting).
If I let the engine warm up, then shut it off (let' say go to dinner or grocery shop then come back out) start it 45 minutes to an hour later, it will make a very loud rattle for about 5 seconds then go back to the normal ticking noise. On a few occasions its even shook the car pretty violently and then stalled (all within the first 5 to 10 seconds of starting).
the tach vary widely, like it's running on 3 cylinders. This will sometimes also shake the car.
Does this sound like the issue? Told my dealer and they said no knowledge of such an issue.
?? What does the oil drain valve do? Is it pooling oil in the crankcase or what,
so crank when started is pushing thru too much oil?
Thanks for pointing this out!
03-06-2014, 02:26 PM
#9
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My 2013, after being warm and then sitting for an hour, sometimes has
the tach vary widely, like it's running on 3 cylinders. This will sometimes also shake the car.
Does this sound like the issue? Told my dealer and they said no knowledge of such an issue.
?? What does the oil drain valve do? Is it pooling oil in the crankcase or what,
so crank when started is pushing thru too much oil?
Thanks for pointing this out!
the tach vary widely, like it's running on 3 cylinders. This will sometimes also shake the car.
Does this sound like the issue? Told my dealer and they said no knowledge of such an issue.
?? What does the oil drain valve do? Is it pooling oil in the crankcase or what,
so crank when started is pushing thru too much oil?
Thanks for pointing this out!
As far as the car shake, I've experienced the shaking (minor) a number of times. But the violent shake only 2 or 3 times, and the engine would stall when that happens. Not sure if its related to the service bulletin (doesn't mention anything about stalling in the bulletin). but will have dealer check it out and read out anything that is logged in the computer.
