# 2012 Mercedes-Benz GLK-Class - faulty error system

**URL:** <https://community.cartalk.com/t/2012-mercedes-benz-glk-class-faulty-error-system/133525>\
**Category:** Maintenance/Repairs\
**Tags:** mercedes-benz, glk-class\
**Created:** [January 29, 2019, 8:49am UTC](https://community.cartalk.com/t/2012-mercedes-benz-glk-class-faulty-error-system/133525 "2019-01-29T08:49:39Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![WilhelmEngstrom](https://avatars.discourse-cdn.com/v4/letter/w/b5ac83/32.png) [@WilhelmEngstrom](https://community.cartalk.com/u/WilhelmEngstrom)\
**Post date:** [January 29, 2019, 8:49am UTC](https://community.cartalk.com/t/2012-mercedes-benz-glk-class-faulty-error-system/133525/1 "2019-01-29T08:49:39Z")

</div>

What is wrong with my vehicle? I get a fault notice that left turn signal light is broke. However the turn signal lights all work fine. It´s the notice system that is bust. What can I do?

---

<div class="post-metadata">

**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\
**Post date:** [January 29, 2019, 2:10pm UTC](https://community.cartalk.com/t/2012-mercedes-benz-glk-class-faulty-error-system/133525/2 "2019-01-29T14:10:18Z")

</div>

Take it to the Benz dealer and tell them the problem you are having. It may be software, it may be hardware, there is no way for a group of even knowledgeable folks on the internet to know for sure.

Be prepared to pay a diagnostic fee. And because it is Mercedes Benz, it will be a large bill. It will take some work to determine what is causing this and the tech deserves to be paid. You want it fixed the first time, right?

---

<div class="post-metadata">

**Author:** ![lion9car](https://avatars.discourse-cdn.com/v4/letter/l/59ef9b/32.png) [@lion9car](https://community.cartalk.com/u/lion9car)\
**Post date:** [January 29, 2019, 3:40pm UTC](https://community.cartalk.com/t/2012-mercedes-benz-glk-class-faulty-error-system/133525/3 "2019-01-29T15:40:19Z")

</div>

If these are incandescent bulbs, it would be cheap to replace all of them first just to make sure they all have good filaments and good electrical contact.