# 2001 Mercedes-Benz CLK-Class master key

**URL:** <https://community.cartalk.com/t/2001-mercedes-benz-clk-class-master-key/120402>\
**Category:** Maintenance/Repairs\
**Tags:** clk-class, mercedes-benz\
**Created:** [July 5, 2018, 5:47am UTC](https://community.cartalk.com/t/2001-mercedes-benz-clk-class-master-key/120402 "2018-07-05T05:47:22Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![MervatHAllam](https://avatars.discourse-cdn.com/v4/letter/m/ecc23a/32.png) [@MervatHAllam](https://community.cartalk.com/u/MervatHAllam)\
**Post date:** [July 5, 2018, 5:47am UTC](https://community.cartalk.com/t/2001-mercedes-benz-clk-class-master-key/120402/1 "2018-07-05T05:47:22Z")

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```
                The Problem

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1- The master key does not open the doors or the trunk.  
2- when I put the key in the starter (ignition) it does not turn, and I can not start the engine and it makes a sign in the front (remove the key)

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<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:** [July 5, 2018, 1:11pm UTC](https://community.cartalk.com/t/2001-mercedes-benz-clk-class-master-key/120402/2 "2018-07-05T13:11:43Z")

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The battery in the master key has gone dead, the security system cannot identify the key as correct so won’t allow you to start the car. Replace the battery.