Has anyone cleaned the evaporator in the W220?
There is a recommended procedure in WIS for this job (AR83.30-P-5555T and/or AR83.30-P-5556A) but I can't find specific info for the W220. A dealer quoted me $700.

There are very special tools and chemicals for this job, but there's also this:

from Germany that's an order of magnitude cheaper and that I plan on using on the evaporator.

Part of the $700 quote included the replacement of all four cabin air filters.

So basically I can't find any info on this job and I'm wondering if someone else has done it.

 

What is the reason for cleaning the evaporator?

To me the filters are a separate job, especially the charcoal filters which I never really use.

 

It was merely part of the quote. I ordered from FCP Euro so I will use their warranty as necessary.

The reason for the cleaning is poor AC performance, even after replacing the pump and servicing the entire unit. Either the mixture flap is stuck, which I don't believe is the case, or the evaporator core is dirty.