# 2016 Mercedes-Benz GL-Class - Jerking when initially starting

**URL:** <https://community.cartalk.com/t/2016-mercedes-benz-gl-class-jerking-when-initially-starting/188451>\
**Category:** Maintenance/Repairs\
**Tags:** mercedes-benz\
**Created:** [January 12, 2023, 2:25pm UTC](https://community.cartalk.com/t/2016-mercedes-benz-gl-class-jerking-when-initially-starting/188451 "2023-01-12T14:25:48Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![VM45](https://avatars.discourse-cdn.com/v4/letter/v/b487fb/32.png) [@VM45](https://community.cartalk.com/u/VM45)\
**Post date:** [January 12, 2023, 2:25pm UTC](https://community.cartalk.com/t/2016-mercedes-benz-gl-class-jerking-when-initially-starting/188451/1 "2023-01-12T14:25:48Z")

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Not all the time, but when I start my car, I will begin hesitating while I am in park. I can feel a jerk back and forth. Once I start driving, it stops.

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**Author:** ![PvtPublic](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/pvtpublic/32/13089_2.png) [@PvtPublic](https://community.cartalk.com/u/PvtPublic)\
**Post date:** [January 12, 2023, 9:09pm UTC](https://community.cartalk.com/t/2016-mercedes-benz-gl-class-jerking-when-initially-starting/188451/2 "2023-01-12T21:09:25Z")

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> [@VM45](#):
>
> I will begin hesitating while I am in park.

He who hesitates is lost.

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**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\
**Post date:** [January 12, 2023, 9:51pm UTC](https://community.cartalk.com/t/2016-mercedes-benz-gl-class-jerking-when-initially-starting/188451/3 "2023-01-12T21:51:37Z")

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> [@VM45](#):
>
> hesitating … in park

That sounds like an idle problem. Many possibilities, but two common causes of rough idling:

- throttle-valve sticking or out correct position
- fuel/air mixture problem, vacuum system leak for example