I have s 02 C320 wagon with 32000 miles is just about ready for A service(1500) to go. My AC has had a problem with the Musty smell that several have posted about. My dealer has been very good about cleaning it each time I complain about it (3x's). I am wondering if a more long lasting fix can be done. I don't mind having the dealer fix it but when it goes off warenty I don't want to have to pay to get it fixed every six months or so. Ideas??? Can the whole duct be changed? Would running this up to a regional rep help? (dealer has been very good) Thanks

Hello,
MB stopped coating the evaporators in the a/c box with anti-fungal coating
in 2000. However, there are a few things that can cause your issue as well.

- Blower fan speed set to min or low. This causes moisture to never be dried
out of the heater box. Try turning your fan to max for a few minutes with the
a/c turned off. This should help dry things out.

- Version coding in EIS control unit wrong. Have your dealer check the coding
in the electronic ignition switch for climate control settings. The RE-HEAT mode should be set for "Anti-icing Protection".

- Heater box not draining evap water completely. I have had to replace a few heater units (complete) for being cast funny and not draining well.
Also, the drain tubes should be checked for being plugged.

- A/C air filter plugged. causing weak air flow. Should be replaced at every B service.

The dealer should invesigate these items and proceed accordingly.
Good luck,
Dr.D

Greetings to all!

I think that I got clogged water drains in my heater/AC block. I started getting a musty odor the past week and cannot spot a water leak from underneath the SUV as usual. Are these drains obvious to find if I go under the SUV? Any pictures? Can I unclogg them by simply running a wire through the opening?

Thanks!

TJ

__________________
TJ

1998 ML 320
2002 Jag X-type