M-Class (W166) Produced 2012-2015

2012 ml350 car swerves/shifts to the right when i accelerate

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Old Apr 1, 2026 | 01:35 PM
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2012 ml350 car swerves/shifts to the right when i accelerate

It’s a weird one, guys — rather urgent.

When I’m driving, at a certain point during an upshift the car does a tiny swerve to the right. Even the steering wheel turns slightly clockwise. It only happens at one specific moment in the gear change.

ELI5 version: the car does a tiny wiggle or swerve exactly when the transmission shifts up.

Turning left, turning right, or accelerating in a straight line doesn’t change anything. It’s only during the upshift. The best way I can describe it is: it feels exactly like when a bicycle’s rear tire rubs the frame for a second and slows you down.


Last edited by e350forme; Apr 1, 2026 at 01:37 PM.
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Old Apr 2, 2026 | 07:53 AM
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04 E55, 06 E55, 05 G55, 14 E63s, 12 cls63
Originally Posted by e350forme
It’s a weird one, guys — rather urgent.

When I’m driving, at a certain point during an upshift the car does a tiny swerve to the right. Even the steering wheel turns slightly clockwise. It only happens at one specific moment in the gear change.

ELI5 version: the car does a tiny wiggle or swerve exactly when the transmission shifts up.

Turning left, turning right, or accelerating in a straight line doesn’t change anything. It’s only during the upshift. The best way I can describe it is: it feels exactly like when a bicycle’s rear tire rubs the frame for a second and slows you down.
id start checking all you’re bearings, bushings and trans/motor mounts
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Old Apr 2, 2026 | 02:01 PM
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2014 ML63, 2018 GLC43, 1929 DB victory six sports roadster
Try turning the lane assist off and see what happens.
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Old Apr 7, 2026 | 12:59 PM
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2014 ML550
I have a 2014 ML550, and it is pretty squirrely around corners. I am in the process of replacing the struts/shocks all around as well as control arm bushings and other pieces in that family. Yours doesn't really sound like that, but I was surprised just how badly the shocks were gone on a 12-YO vehicle. I know it's a BIG sucker, and it has 92K miles, but these shocks were GONE. The bump stops were all crumbled and broken at the bottom. I have done the back, but I need to do the fronts, and then take it in for an alignment.
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