Thanks to many of you on this site, I was able to follow the procedures for pulling climate control fault codes, well almost. Two questions.

1) I am not getting any fault codes mentioned in various threads. All I am getting is E on the left side screen and FF on the right side. Does anyone know what E -- FF means?

2) Taking a wild guess that FF could mean filtration filter, does anyone know how to replace dust filters ( not the charcoal filters)? The charcoal filters are pretty easy to access but is there an easy way to access the dust filters, that appears to be located on top of heater unit, below the glove compartment.

I have a 1998 E320 (w210) with 70,000 miles and no cold air at the moment.

Thanks,