Key won't lock the doors reliably
Thread Starter
MBWorld Fanatic!
Joined: Sep 2010
Posts: 1,434
Likes: 4
From: Raleigh, NC
2005 C230K, 2019 Honda CR-V, '74 Lotus Europa
Key won't lock the doors reliably
For a few months my car would usually lock the doors but today it only worked once. It doesn't matter how far away I am. I have a tint but it's a couple of years old. My key is at most a couple of years old. It unlocks the doors and trunk fine but it seems to be having a harder and harder time locking the doors.
I was sure there was a thread on this within the last few months and I was also sure that Glyn recommended looking for corrosion on a particular fuse, but I have been able to find it.
Any ideas?
I was sure there was a thread on this within the last few months and I was also sure that Glyn recommended looking for corrosion on a particular fuse, but I have been able to find it.
Any ideas?
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 192
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
The central locking is electronically controlled. Only fuse 41 for internal switches.
Do you have the problem with both keys? Have you replaced the key battery? Good battery is crucial for remote operation.
Is your radio reception normal ~ especially AM?
Do you have the problem with both keys? Have you replaced the key battery? Good battery is crucial for remote operation.
Is your radio reception normal ~ especially AM?
Thread Starter
MBWorld Fanatic!
Joined: Sep 2010
Posts: 1,434
Likes: 4
From: Raleigh, NC
2005 C230K, 2019 Honda CR-V, '74 Lotus Europa
Thanks for the quick reply, Glyn!
Ok, I think I've entered the Twilight Zone. The key I've been using is a new style key (with the chrome trim). It is pretty new as I bought it several months after I got my car (used). I found an old key - one of the ones I got with the car. It's an old style key. It seemed to reliably lock and unlock the doors (it worked every time I tried it - about 10 times). The new key was less reliable but started working better. I kept unlocking the doors and then locking them with which ever key worked. After a while, the new chrome key started working very reliably! I don't know what (if anything) changed!
Does that make any sense?
Ok, I think I've entered the Twilight Zone. The key I've been using is a new style key (with the chrome trim). It is pretty new as I bought it several months after I got my car (used). I found an old key - one of the ones I got with the car. It's an old style key. It seemed to reliably lock and unlock the doors (it worked every time I tried it - about 10 times). The new key was less reliable but started working better. I kept unlocking the doors and then locking them with which ever key worked. After a while, the new chrome key started working very reliably! I don't know what (if anything) changed!
Does that make any sense?
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 192
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
It does not make sense. The battery might be a bit lazy in the new style key & might have been warmer from being in a pocket or whatever when you tried it again.
Thread Starter
MBWorld Fanatic!
Joined: Sep 2010
Posts: 1,434
Likes: 4
From: Raleigh, NC
2005 C230K, 2019 Honda CR-V, '74 Lotus Europa
It didn't make sense to me either!
My new key was in my pocket so it would have been warmer. After I posted my previous post, the locks have worked very well - I'm not sure I can say flawlessly, but virtually every time I used them. It's almost as though something was stuck and once it was jostled free, it started working pretty well.
My new key was in my pocket so it would have been warmer. After I posted my previous post, the locks have worked very well - I'm not sure I can say flawlessly, but virtually every time I used them. It's almost as though something was stuck and once it was jostled free, it started working pretty well.
Thread Starter
MBWorld Fanatic!
Joined: Sep 2010
Posts: 1,434
Likes: 4
From: Raleigh, NC
2005 C230K, 2019 Honda CR-V, '74 Lotus Europa
I am! 
Though I am a little worried about a possible next time and it happening in a more inhospitable place than my church parking lot or my driveway.
Though I am a little worried about a possible next time and it happening in a more inhospitable place than my church parking lot or my driveway.
Trending Topics
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
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
