Rumble When stepping on the gas - 2012 ML350
Thread Starter
Newbie
Joined: Jul 2013
Posts: 10
Likes: 4
2012 ML350
Rumble When stepping on the gas - 2012 ML350
Hello all,
I have been chasing an issue in my wife's 2012 ML350. When the accelerator is depressed, the car seems to rumble (and struggle to accelerate) for a short period of time until the acceleration is constant, or I take my foot off the accelerator, this only happens when i am lightly accelerating. If I am aggressive with the car I never have the problem. I replaced the spark plugs and the ignition coils (all 6) and still have the same issue. I did a transmission flush ~25K miles ago as well. Not sure what to check next. I never see the problem once the car is at a steady speed, or notice anything when decelerating.
Thanks for any thoughts.
Jason
I have been chasing an issue in my wife's 2012 ML350. When the accelerator is depressed, the car seems to rumble (and struggle to accelerate) for a short period of time until the acceleration is constant, or I take my foot off the accelerator, this only happens when i am lightly accelerating. If I am aggressive with the car I never have the problem. I replaced the spark plugs and the ignition coils (all 6) and still have the same issue. I did a transmission flush ~25K miles ago as well. Not sure what to check next. I never see the problem once the car is at a steady speed, or notice anything when decelerating.
Thanks for any thoughts.
Jason
Out Of Control!!
Joined: Sep 2018
Posts: 14,666
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From: unbegrenzt
2017 GLE350 4MATIC
Engine or transmission mounts?
Pop the hood and stand and watch while an assistant blips the throttle with the engine idling. If the engine moves more than normal or than you think it should, engine or transmission mounts are suspect. MB mounts are relatively low age/mileage items.
Another possibility is propshaft rubber joints/biscuits/couplings. If the engine mount test is inconclusive, crawl under the car and look carefully and closely with a bright flashlight at the propshaft flex couplings.
Pop the hood and stand and watch while an assistant blips the throttle with the engine idling. If the engine moves more than normal or than you think it should, engine or transmission mounts are suspect. MB mounts are relatively low age/mileage items.
Another possibility is propshaft rubber joints/biscuits/couplings. If the engine mount test is inconclusive, crawl under the car and look carefully and closely with a bright flashlight at the propshaft flex couplings.
Thread Starter
Newbie
Joined: Jul 2013
Posts: 10
Likes: 4
2012 ML350
Engine or transmission mounts?
Pop the hood and stand and watch while an assistant blips the throttle with the engine idling. If the engine moves more than normal or than you think it should, engine or transmission mounts are suspect. MB mounts are relatively low age/mileage items.
Another possibility is propshaft rubber joints/biscuits/couplings. If the engine mount test is inconclusive, crawl under the car and look carefully and closely with a bright flashlight at the propshaft flex couplings.
Pop the hood and stand and watch while an assistant blips the throttle with the engine idling. If the engine moves more than normal or than you think it should, engine or transmission mounts are suspect. MB mounts are relatively low age/mileage items.
Another possibility is propshaft rubber joints/biscuits/couplings. If the engine mount test is inconclusive, crawl under the car and look carefully and closely with a bright flashlight at the propshaft flex couplings.
Thread Starter
Newbie
Joined: Jul 2013
Posts: 10
Likes: 4
2012 ML350
Nothing conclusive on either of these checks. Is there any chance the struts are shot and the dampening system is causing this? I am trying to figure out if I have the air dampening option, as the rumble seems to only last for 1 second, like the strut is trying to dampen itself but since is shot it is just creating a rumble.
