Key Not Working
Thread Starter
Senior Member
Joined: Aug 2011
Posts: 424
Likes: 13
From: Orange County
2005 E55 AMG
Key Not Working
I have an 05 CLK55
The key just stopped working. I found out it works occasionally when I put the key directly to the drivers side door. The key still starts the car and the unlocking and locking works when you press the button on the dash.
Can someone steer me in the right direction to get this fixed. My tech said start with getting a new key.
My friend has the same year but a CLK500.. and he has had this issue for almost a year now. It seems its a common issue on our cars I guess.
Thanks for the help in advance.
The key just stopped working. I found out it works occasionally when I put the key directly to the drivers side door. The key still starts the car and the unlocking and locking works when you press the button on the dash.
Can someone steer me in the right direction to get this fixed. My tech said start with getting a new key.
My friend has the same year but a CLK500.. and he has had this issue for almost a year now. It seems its a common issue on our cars I guess.
Thanks for the help in advance.
MBworld Guru
Joined: Dec 2009
Posts: 10,782
Likes: 1,011
NO LONGER ACTIVE
When you press the buttons on the SmartKey, does its red LED blink? If not, then it's either the battery in the SmartKey itself or a circuit board issue inside the key. And you say you checked fuse #8, on the rear SAM (in the trunk) right? One more thing to try is changing the global/local unlocking setting by pressing and holding LOCK and UNLOCK on the key until the LED blinks. Sometimes that can wake up a bad key. Oh, and do you have a spare key? Does it work? if you don't have one, then you should get one.
Thread Starter
Senior Member
Joined: Aug 2011
Posts: 424
Likes: 13
From: Orange County
2005 E55 AMG
Key Not Working
Thanks Rudeney,
Yes the red light blinks on the key. Im thinking and hoping its the circuit board inside the key. I do not have a spare so Ill be getting a new key ASAP. Fingers Crossed it fixes the problem.
Ill definitely try the the global setting.
Yes the red light blinks on the key. Im thinking and hoping its the circuit board inside the key. I do not have a spare so Ill be getting a new key ASAP. Fingers Crossed it fixes the problem.
Ill definitely try the the global setting.
When you press the buttons on the SmartKey, does its red LED blink? If not, then it's either the battery in the SmartKey itself or a circuit board issue inside the key. And you say you checked fuse #8, on the rear SAM (in the trunk) right? One more thing to try is changing the global/local unlocking setting by pressing and holding LOCK and UNLOCK on the key until the LED blinks. Sometimes that can wake up a bad key. Oh, and do you have a spare key? Does it work? if you don't have one, then you should get one.
Super Member
Joined: Oct 2012
Posts: 538
Likes: 88
From: Hollywood, CA
W209, W124
If aiming at driver door handle works while it doesn't work anywhere else points to RF part not working.
Did you recently have windows tinted? Sometimes when those guys run knives around edge of rear window to trim the tint they cut the antennae cable.
If you dropped the key previous to it dying, you may have broken a solder joint on the board. Sometimes an entire component will get knocked off. Open it up over a piece of white paper so if anything falls out you will see it.
Did you recently have windows tinted? Sometimes when those guys run knives around edge of rear window to trim the tint they cut the antennae cable.
If you dropped the key previous to it dying, you may have broken a solder joint on the board. Sometimes an entire component will get knocked off. Open it up over a piece of white paper so if anything falls out you will see it.
Thread Starter
Senior Member
Joined: Aug 2011
Posts: 424
Likes: 13
From: Orange County
2005 E55 AMG
RF
Had them tinted a while ago and have had no issues.
I might have dropped the key, I cant recall. Ill try taking the key apart.
I might have dropped the key, I cant recall. Ill try taking the key apart.
If aiming at driver door handle works while it doesn't work anywhere else points to RF part not working.
Did you recently have windows tinted? Sometimes when those guys run knives around edge of rear window to trim the tint they cut the antennae cable.
If you dropped the key previous to it dying, you may have broken a solder joint on the board. Sometimes an entire component will get knocked off. Open it up over a piece of white paper so if anything falls out you will see it.
Did you recently have windows tinted? Sometimes when those guys run knives around edge of rear window to trim the tint they cut the antennae cable.
If you dropped the key previous to it dying, you may have broken a solder joint on the board. Sometimes an entire component will get knocked off. Open it up over a piece of white paper so if anything falls out you will see it.
Trending Topics
MB World Stories
The Best of Mercedes & AMG
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Mercedes Teases Updated EQS With Steer-By-Wire and a Yoke
Verdad Gallardo
8 Mercedes Models With Poor Reliability Records
Verdad Gallardo
