CLK-Class (W209) 2003 on: CLK 270 CDI, CLK 200K, CLK 200 CGI, CLK 240, CLK 320, CLK 350, CLK 500, CLK 550 [Coupes & Cabriolets]

'04 CLK 500 AC issues

Old Jul 25, 2023 | 07:06 PM
  #1  
CiLKy500's Avatar
Thread Starter
Newbie
 
Joined: Jul 2023
Posts: 13
Likes: 3
CLK500
'04 CLK 500 AC issues

Hi all,

I'm new to Mercedes ownership, and in the process of routine maintenance (oil change, new cabin filter, new air filters, coolant flush) on my recently acquired a 2004 CLK500 I have noticed some issues (I'm sure more will be found).

Climate Control:
  • AC is on constantly, so it blows ice cold whether you want it to or not. The AC RST button does not work/does not illuminate when pressed, which was detrimental to flushing the radiator coolant (I was able disable the AC once via the console, so got one good flush, but the subsequent two, I was unable to. Also tried pressing the recirc and front defroster for 10 seconds to reset - got blinking lights, but to no avail. Only blows cold AC
  • The fan speed is at one bar below maximum, and cannot reduce fan speed - can only increase to max. All other buttons for driver and passenger work.
Miscellaneous:
  • I noticed a bunch of severed wires on the passenger side in the engine bay, and have no idea what they are (see picture below). They were exposed when I got the car, but I encased the copper ends in electric tape for the time being. What are these?

what are these wires? Ignore the battery charger wires....

Last edited by CiLKy500; Jul 26, 2023 at 11:06 AM.
Reply
Old Jul 31, 2023 | 09:34 AM
  #2  
CiLKy500's Avatar
Thread Starter
Newbie
 
Joined: Jul 2023
Posts: 13
Likes: 3
CLK500
<Bump>. Any ideas, fellow members? I'd appreciate any good input here.
Reply
Old Aug 5, 2023 | 06:08 PM
  #3  
Clk_master's Avatar
Junior Member
Liked
 
Joined: Oct 2022
Posts: 68
Likes: 11
From: Italy
W209 CLK 270 CDI ELEGANCE 6 gear manual transmission
Hello I see the wires, try to check if there is any label with part number, Via Mercedes EPC we can identify them. For AC maybe you have a bad climate control or the wire exposed are form AC control
Reply

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

Thread Tools
Search this Thread
Rate This Thread
Rate This Thread:
You have already rated this thread Rating: Thread Rating: 0 votes,  average.


All times are GMT -4. The time now is 03:14 PM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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-7
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
story-8
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

Slideshow: These overlooked Mercedes-Benz models never got the spotlight, but they quietly delivered more than most remember.

By Verdad Gallardo | 2026-04-13 19:35:45


VIEW MORE
story-9
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

Slideshow: A well-used 1991 Mercedes-Benz 300D with more than one million miles is now looking for a new owner, and it still appears ready for more.

By Verdad Gallardo | 2026-04-10 10:05:15


VIEW MORE