Mercedes-Benz Forum banner
Cancel

CLK heating blows cold on corners

5825 Views 11 Replies 4 Participants Last post by  keyhole, 
O
Hi,
My 2003 W209 CLK 320 heater blows cold air into the cabin when I go round corners. Any ideas please? I take a route to work with lots of bends and as it's starting to get chilly in the mornings I'd really like to put a stop to it.

Thanks Oliver
Reply
Save
Like
1 - 4 of 12 Posts
keyhole
ollyy said:
Hi,
My 2003 W209 CLK 320 heater blows cold air into the cabin when I go round corners.
Click to expand...
With the greatest of respect, I find this statement almost unbelievable....:)

The climate control system has no idea when you are turning corners, and the g forces generated when turning could not possible affect the a/c dampers. The car's accelerometers are used for ABS control.

There must be another cause of this unwanted cold air. :confused:
Reply
Save
Like
keyhole
cwilson21 said:
Not positive about the Benz, but most damper systems use engine vacuum.
Nice idea... but W209 models have an all-electric a/c system.
Click to expand...
Click to expand...
Reply
Save
Like
keyhole
ollyy said:
I've asked the question on another forum and "duo" valve was mentioned there too...hmmm
Click to expand...
I think that you can forget the duovalve possiblity... they are used on W202 C-class and W208 CLK, but not on your W209.
Reply
Save
Like
keyhole
ollyy said:
Hi,
My 2003 W209 CLK 320 heater blows cold air into the cabin when I go round corners.
Click to expand...
I think that to bring some credibility to this question, we should get some diagnostic measurements of temperature from the OP. The statement of 'cold air' needs clarification. How cold?

Maybe the OP could take some temperature measurements with the car moving in a straight line, then repeat with the car turning.

The CLK does not have a heater as such. The heat exchanger is one component of the climate control system, and the conditioned air exits from a number of vents. The diagram below shows the operation, where ALL the air is chilled/de-humidified prior to subsequent heating as required. The drawing is for a W220 system, but it is similar to the W209 arrangement. Click to enlarge.

Attachments

See less See more
Reply
Save
Like
1 - 4 of 12 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Mercedes-Benz Forum
BenzWorld.org forum is one of the largest Mercedes-Benz owner websites offering the most comprehensive collection of Mercedes-Benz information anywhere in the world. The site includes MB Forums, News, Galleries, Publications, Classifieds, Events and much more!
Full Forum Listing
Explore Our Forums
W126 S,SE,SEC,SEL,SD,SDL Class R/C107 SL/SLC Class W163 M-Class W124 E,CE,D,TD Class W210 E-Class
Top