W208 Aircon moisture and a bit smelly

[rossyl]

Hi,

1999 CLK W208 facelift with climate control aircon.

The aircon had a full service including changing the A/C condensor, and a full re-gas etc. I don't use the car regularly - maybe once a fortnight and even then not for long runs.

When i start up the car and the aircon starts I often get an initial dump of moisture from the vents enough to mist a little bit of the windows. After a 5 minutes the aircon will have sorted this out, and the air will not have excess moisture. There is often an odd whiff at the beginning as well.

I've had a search but not been able to find a solution, except that it might be crub under the car blocking the aircon drain pipe - however, I've no idea if on a W208 that would be the case and where the drain pipe is.

Thanks for the help.
R

 

[BlackC55]

The moisture is fairly normal. My C43 does it.

Use some AC anti-bacterial spray right on the evaporator by removing the dust filter. This will help reduce the smell.

 

[rossyl]

Oh, and the pollen filter was replaced this time last year.

 

[rossyl]

The moisture is fairly normal. My C43 does it.

Use some AC anti-bacterial spray right on the evaporator by removing the dust filter. This will help reduce the smell.

Thanks Olly.

Sorry to be a pain, but do you mind explaining where all those bits and pieces are - i.e. the dust filter and the evaporator.

 

[BlackC55]

Dust filter is under the passenger footwell and with the filter out the evap is exposed.

 

[Xungo]

Hi rossyl,

I recently experienced the same thing in my CLK. There is a drain pipe at the back of the engine bay on the passenger side. When I checked my car I found the end of the pipe was blocked. Poking a finger in released a flood of water and I've had no problems since. Good luck.

 

[Ted]

You should get a puddle of water under the car while the aircon is working. Hotter/more humid the weather, the more water.
If this isn't happening, I would suspect a blocked drain.

 

[rossyl]

Hi rossyl,

I recently experienced the same thing in my CLK. There is a drain pipe at the back of the engine bay on the passenger side. When I checked my car I found the end of the pipe was blocked. Poking a finger in released a flood of water and I've had no problems since. Good luck.

Any more details would be appreciated.

Is it under the car? So would a jet spray under the car help? Or, is it accessible via the bonnet.

Or, as Olly said, all could be fine...but i don't mind having a little look.

Many thanks all.

 

[Xungo]

Any more details would be appreciated.

Is it under the car? So would a jet spray under the car help? Or, is it accessible via the bonnet.

Or, as Olly said, all could be fine...but i don't mind having a little look.

Many thanks all.

The drain I described is not under the car, lift the bonnet and look at the very back on the left side. It's an area which also accumilates leaves. The pipe may have a rubber flap on the end as mine does.
Hope this helps.