Shaking 2013 ML 550
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ML 550 4 Matic
Shaking 2013 ML 550
Have a 2013 ML 550 4 Magic. Around 60k miles, my SUV starts shaking a bit at a stop. Eventually the engine light comes on and its running like it lost 4 cylinders. I limp it home , ride my bike to work a few days while I read blogs on what might be wrong. Common diagnosis is broken motor mount or transmission mount. Some fool says your tranny fluid is low probably so I run to Mercedes dealer and buy some fluid. Little did I know you can't just add transmission fluid because the cap is sealed.No wonder that parts guy had a smirk on his face .After I get back go online and discover all this , I decided to take the car for a service.Funny but other than a slight shaking the car is running fine ,not like the night a few days before hand.They trick me into buying services up front and a week later they tell me I have a problem on #6 cylinder . They tell me it's going to cost $450 to heck it out with a bore scope and a leak down test. I told him hers nuts and he drops it to $150.Two days later I get a call and he tells me it's leaking down 80% on number 6 cylinder. They need to replace the cylinder head on that bank at a cost of $16,000. As my head hit the roof he said he would get back to me after talking to Mercedes Corporate. He dropped it down to $3750. I said no , he dropped it down to $3,000.This service writer is pissing me off royally. I go down there he tells me I would drive that car far. The car has 76,000 miles on it now and when it starts to run rough , I turn off the ignition and restart it ....runs fine again.
Can anyone tell me straight up what would be the cause of this phenomenon. I don't buy that it's a bent valve , or a sticky valve because restarting it clears it . Apparently this is not an uncommon problem on the 4.6 L V8 . Of course Mercedes won't admit it ....Can someone please shed some light on this so I can make an educated choice of what I'm going to do with the car. Thank you ...Paul
Can anyone tell me straight up what would be the cause of this phenomenon. I don't buy that it's a bent valve , or a sticky valve because restarting it clears it . Apparently this is not an uncommon problem on the 4.6 L V8 . Of course Mercedes won't admit it ....Can someone please shed some light on this so I can make an educated choice of what I'm going to do with the car. Thank you ...Paul
MBWorld Fanatic!
Joined: Mar 2004
Posts: 1,175
Likes: 24
From: Boston, MA
'14 ML350, '13 C220 CDI, '07 C280, '98 ML320
Have a 2013 ML 550 4 Magic. Around 60k miles, my SUV starts shaking a bit at a stop. Eventually the engine light comes on and its running like it lost 4 cylinders. I limp it home , ride my bike to work a few days while I read blogs on what might be wrong. Common diagnosis is broken motor mount or transmission mount. Some fool says your tranny fluid is low probably so I run to Mercedes dealer and buy some fluid. Little did I know you can't just add transmission fluid because the cap is sealed.No wonder that parts guy had a smirk on his face .After I get back go online and discover all this , I decided to take the car for a service.Funny but other than a slight shaking the car is running fine ,not like the night a few days before hand.They trick me into buying services up front and a week later they tell me I have a problem on #6 cylinder . They tell me it's going to cost $450 to heck it out with a bore scope and a leak down test. I told him hers nuts and he drops it to $150.Two days later I get a call and he tells me it's leaking down 80% on number 6 cylinder. They need to replace the cylinder head on that bank at a cost of $16,000. As my head hit the roof he said he would get back to me after talking to Mercedes Corporate. He dropped it down to $3750. I said no , he dropped it down to $3,000.This service writer is pissing me off royally. I go down there he tells me I would drive that car far. The car has 76,000 miles on it now and when it starts to run rough , I turn off the ignition and restart it ....runs fine again.
Can anyone tell me straight up what would be the cause of this phenomenon. I don't buy that it's a bent valve , or a sticky valve because restarting it clears it . Apparently this is not an uncommon problem on the 4.6 L V8 . Of course Mercedes won't admit it ....Can someone please shed some light on this so I can make an educated choice of what I'm going to do with the car. Thank you ...Paul
Can anyone tell me straight up what would be the cause of this phenomenon. I don't buy that it's a bent valve , or a sticky valve because restarting it clears it . Apparently this is not an uncommon problem on the 4.6 L V8 . Of course Mercedes won't admit it ....Can someone please shed some light on this so I can make an educated choice of what I'm going to do with the car. Thank you ...Paul
It doesn't pass the smell test.
Did they run STAR diagnostics? were there any codes?
