# Mercedes 300E cruise control

**URL:** <https://community.cartalk.com/t/mercedes-300e-cruise-control/13809>\
**Category:** Maintenance/Repairs\
**Created:** [May 10, 2008, 2:13am UTC](https://community.cartalk.com/t/mercedes-300e-cruise-control/13809 "2008-05-10T02:13:57Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![vincent52100](https://avatars.discourse-cdn.com/v4/letter/v/c68b51/32.png) [@vincent52100](https://community.cartalk.com/u/vincent52100)\
**Post date:** [May 10, 2008, 2:13am UTC](https://community.cartalk.com/t/mercedes-300e-cruise-control/13809/1 "2008-05-10T02:13:57Z")

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Hi. I have a 1990 MB 300E. When you try to set the cruise control the speed just keeps increasing, set it at 45mph and was going 80 before I shut it off. Any ideas of the problem and possible fix would be greatly appreciated. Thanks

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**Author:** ![Craig58](https://avatars.discourse-cdn.com/v4/letter/c/3da27b/32.png) [@Craig58](https://community.cartalk.com/u/Craig58)\
**Post date:** [May 10, 2008, 2:29am UTC](https://community.cartalk.com/t/mercedes-300e-cruise-control/13809/2 "2008-05-10T02:29:04Z")

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It’s usually the amp, talk to these guys:

[http://www.gdl-online.com/price.html](http://www.gdl-online.com/price.html)

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**Author:** ![SteveF](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/stevef/32/2_2.png) [@SteveF](https://community.cartalk.com/u/SteveF)\
**Post date:** [May 10, 2008, 2:53am UTC](https://community.cartalk.com/t/mercedes-300e-cruise-control/13809/3 "2008-05-10T02:53:13Z")

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As I recall, one stalk controls everything. Up or down, forward or back. It is possible that the switch inside is not sending the right message to the amp.

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**Author:** ![Craig58](https://avatars.discourse-cdn.com/v4/letter/c/3da27b/32.png) [@Craig58](https://community.cartalk.com/u/Craig58)\
**Post date:** [May 10, 2008, 2:58am UTC](https://community.cartalk.com/t/mercedes-300e-cruise-control/13809/4 "2008-05-10T02:58:07Z")

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That is also possible, here is a troubleshooting procedure for the switch:

[http://www.gdl-online.com/test024.html](http://www.gdl-online.com/test024.html)