CLK350 Air Conditioning
Thread Starter
Newbie
Joined: Feb 2014
Posts: 14
Likes: 0
CLK 350
CLK350 Air Conditioning
I have a 2006 CLK350 conv and the AC from the passenger side vents is cold and seems to be working normally but the driver side vents seem to blow air that is only slightly cooled.
Any suggestions?
Any suggestions?
MBworld Guru
Joined: Dec 2009
Posts: 10,782
Likes: 1,011
NO LONGER ACTIVE
I've seen this happen when the system is low on refrigerant. You'd expect it to affect both sides, but often the driver's side blows warm air first. Another possibility is a damper control problem. Try the ACC test/reset - with the engine running, simultaneously press and hold the RECIRC and FRONT DEFOG buttons until their indicator lights begin to flash. Release them and they should continue to flash for another 20-30 seconds. If they don't stop, then you have a problem in the system that needs proper diagnosis (likely problem with a damper servo in the duct).
Junior Member
Joined: Jun 2014
Posts: 50
Likes: 0
W209
Hello all, I'm having the same problem here and I tried to reset the system but not succeed,
If this is the damper problem, can we easily fix it? How critical to do this?
I just refilled the refrigerant but just doesn't help the ac system
If this is the damper problem, can we easily fix it? How critical to do this?
I just refilled the refrigerant but just doesn't help the ac system
MBworld Guru
Joined: Dec 2009
Posts: 10,782
Likes: 1,011
NO LONGER ACTIVE
If the ACC test/reset procedure did not complete (i.e. the RECIRC and FRONT DEFOG lights continue to flash and don't stop) it means there is a problem in the system. You need to get codes pulled with SDS to see what the problem is.
Junior Member
Joined: Jun 2014
Posts: 50
Likes: 0
W209
Thanks Rudeney, but I don't wanna return to dealer and I hope this is just mechanic issue and I can fix it, because I know they will charge me huge money ><
I saw someone replaced the condenser and very good feedback, as my CLK already 10 years so should I try this?
I saw someone replaced the condenser and very good feedback, as my CLK already 10 years so should I try this?
MBworld Guru
Joined: Dec 2009
Posts: 10,782
Likes: 1,011
NO LONGER ACTIVE
Kenny, I am not a proponent of throwing parts at problems. I'd rather do a proper diagnosis and replace the right parts. If the ACC reset never finished, then that usually indicates a damper problem. Now you need to find out which one is bad. The one that most often fails is, of course, the one that is most difficult to replace - you have to pull the entire dash and duct (including heater core and A/C evaporator). Like I said, a proper diagnosis is imperative. If you don't want to pay dealer prices, and you are a good mechanic and aren't afraid of the electronics, you might consider investing in SDS. You can get a Chinese "clone" version for around $500. It's saved me that much in airbag resets alone.
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
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Junior Member
Joined: Jun 2014
Posts: 50
Likes: 0
W209
Thx again Rudeney, but I think I get you the wrong message.. sorry
I was tried to hold the RECIRC and FRONT DEFOG buttons but I only seeing the windows going down or up,
Anyhow, I took my car and checked by the mechanic, they refilled the freon for me and if it's not cold again then we should check the damper or maybe somewhere there is leaking,
Thanks again Rudeney!!
I was tried to hold the RECIRC and FRONT DEFOG buttons but I only seeing the windows going down or up,
Anyhow, I took my car and checked by the mechanic, they refilled the freon for me and if it's not cold again then we should check the damper or maybe somewhere there is leaking,
Thanks again Rudeney!!
MBworld Guru
Joined: Dec 2009
Posts: 10,782
Likes: 1,011
NO LONGER ACTIVE
Oh, I see. If the windows go up and down, you are holding down just the RECIRC button. Holding it activates "tunnel mode" which closes all the windows and switches to RECIRC mode or opens all the windows and switches RECIRC off. You have to press booth RECIRC and the FRONT DEFOG buttons. Also try just pressing the FRONT DEFOG button momentarily by itself to make sure it is working.
Junior Member
Joined: Jun 2014
Posts: 50
Likes: 0
W209
Oh, I see. If the windows go up and down, you are holding down just the RECIRC button. Holding it activates "tunnel mode" which closes all the windows and switches to RECIRC mode or opens all the windows and switches RECIRC off. You have to press booth RECIRC and the FRONT DEFOG buttons. Also try just pressing the FRONT DEFOG button momentarily by itself to make sure it is working.
Junior Member
Joined: Jun 2014
Posts: 50
Likes: 0
W209
MBworld Guru
Joined: Dec 2009
Posts: 10,782
Likes: 1,011
NO LONGER ACTIVE
You can get a fluorescent dye to put in the system and then use an ultraviolet light and special lens glasses to look for leaks. A slow leak will need to be checked over a period of days or weeks.
Junior Member
Joined: Jun 2014
Posts: 50
Likes: 0
W209
