C-Class (W203) 2001-2007, C160, C180, C200, C220, C230, C240, C270, C280, C300, C320, C230K, C350, Coupe

Both Remote Keys Not Working - FIXED!!!

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old May 26, 2009 | 06:02 PM
  #1  
loudbmw's Avatar
Thread Starter
Member
 
Joined: Jan 2004
Posts: 75
Likes: 6
From: Virginia
17 E300, 17 C300, 14 C250
Both Remote Keys Not Working - FIXED!!!

2005 C320 with 60K miles. Got home from a weeks vacation and neither key would unlock doors in rf (radio frequency) mode. Keys did work in infrared mode if held close to driver's side door.

Put new batteries in one remote - no difference. Went to check fuses (fuse chart missing of course). Found one on line:

https://mbworld.org/forums/c-class-w...e-box-map.html

Pulled fuses 8,9,21,22,32 & 33. All were good.

Tried remote key again after pulling fuse - you guessed it, both keys now work perfectly!

That's what I call a cheap fix.

Lou
Reply
Old May 26, 2009 | 06:26 PM
  #2  
C230 Sport Coup's Avatar
MBWorld Fanatic!
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Jun 2002
Posts: 7,268
Likes: 172
From: So. Oregon Coast
C230 Sport Coup + 2006 W164 ML350 + 99 Ford Escort RIP
Odd. Could it be that reseating the fuses cleaned up the connections a bit?
Did you see any corrosion?
Reply
Old May 27, 2009 | 02:41 AM
  #3  
Glyn M Ruck's Avatar
Super Moderator
MBWorld Ambassador

 
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
Could have rebooted a micro processor somewhere by pulling fuses & cutting power.
Reply
Old May 27, 2009 | 01:19 PM
  #4  
jscavo's Avatar
Member
 
Joined: Jun 2002
Posts: 131
Likes: 0
w203
had similiar fuse issue for pano roof. went to use it for the first time since before the winter and nothing. check the fuse map and pulled the pano fuse, it looked good, put it back in and it worked. lucky.
Reply
Old Mar 21, 2022 | 10:11 AM
  #5  
bekkerh's Avatar
Newbie
 
Joined: Mar 2022
Posts: 8
Likes: 0
W202
Hello all,

1st post , been doing a bunch of reading and research here. Bought a W203 a week ago and trying to resolve the central locking issue. Sedan car
IR works, new batteries in fobs. One new fob, one original - original IR does not work

#8 fuse OK, replaced anyway
FM radio signal fine, AM is so-so (but I guess thats normal?)
Car had a flat battery before I bought it, ex-owner replaced it (something here?)
Car has a tint - ex-owner says the RF still worked after tinting

I would greatly appreciate any help!
Reply
Old Mar 21, 2022 | 11:45 PM
  #6  
S70Houston's Avatar
MBWorld Fanatic!
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Mar 2015
Posts: 1,975
Likes: 265
From: Sacramento, CA
2018 GLC300 4Matic; 2008 ML550 4Matic; 2004 C320
Originally Posted by bekkerh
Hello all, 1st post , been doing a bunch of reading and research here. Bought a W203 a week ago and trying to resolve the central locking issue. Sedan carIR works, new batteries in fobs. One new fob, one original - original IR does not work #8 fuse OK, replaced anywayFM radio signal fine, AM is so-so (but I guess thats normal?)Car had a flat battery before I bought it, ex-owner replaced it (something here?)Car has a tint - ex-owner says the RF still worked after tinting I would greatly appreciate any help!
Had exactly the same issue you are describing. See below thread.​​​​​​​​​​​​​​ ​​​​​​​https://mbworld.org/forums/c-class-w...ob-issues.html ​​​​​​​You will need a new antenna amplifier.
Reply

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


You have already rated this thread Rating: Thread Rating: 0 votes,  average.


All times are GMT -4. The time now is 07:04 PM.

story-0
Six Gift Ideas Your AMG Loving Dad or Grad Will Cherish

Slideshow: Six gift ideas your AMG loving dad or grad will cherish.

By | 2026-06-03 17:26:18


VIEW MORE
story-1
7 Craziest Things AMG Gas Ever Built

Slideshow: Sometimes AMG builds fast sedans. Other times, it builds twin-turbo V12 land missiles and six-wheeled off-road monsters.

By Verdad Gallardo | 2026-05-26 17:59:58


VIEW MORE
story-2
New Electric Mercedes-AMG GT 4-Door Coupe Unveiled: 10 Things You Need to Know

Slideshow: Mercedes-AMG's new electric GT 4-Door Coupe trades combustion for software, synthetic noise, and more than 1,100 horsepower.

By Verdad Gallardo | 2026-05-20 20:08:15


VIEW MORE
story-3
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

Slideshow: Not every Mercedes design becomes timeless, some feel stuck in the era they came from.

By Verdad Gallardo | 2026-05-12 18:09:07


VIEW MORE
story-4
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

Slideshow: Yes, Mercedes built manual cars, and some of them are far more interesting than you'd expect.

By Verdad Gallardo | 2026-05-02 12:36:58


VIEW MORE
story-5
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.

By Verdad Gallardo | 2026-04-29 11:19:28


VIEW MORE
story-6
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

Slideshow: Before curves took over, Mercedes mastered the art of the straight line, and some of those shapes still look right today.

By Verdad Gallardo | 2026-04-25 12:05:49


VIEW MORE
story-7
Flawlessly Restored Mercedes 190E Evo II Heads to Auction

Slideshow: The 190E Evolution II shows how a homologation necessity became a six-figure collector icon.

By Verdad Gallardo | 2026-04-22 17:53:47


VIEW MORE
story-8
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

Slideshow: Mercedes is turning one of its core nameplates electric, and the details show just how serious this shift is.

By Verdad Gallardo | 2026-04-21 13:58:06


VIEW MORE
story-9
Mercedes EQS Gets A Major Update: Everything You Need to Know

Slideshow: Faster charging, longer range, and a controversial steer-by-wire system define the latest evolution of Mercedes-Benz EQS.

By Verdad Gallardo | 2026-04-15 10:35:34


VIEW MORE