I just did and it reaffirms what I said. The alkaline solution is the dishwashing soap or Liquid Tide I mentioned. The citric acid solution is an acidic solution not an alkaline solution and is not used for deoiling.

BTW, this is the first time I've pulled up a document on WIS using the document number. Is there a menu somewhere in WIS of all the document numbers and what they pertain to?

Thanks.

Len

not really a list of them that i know of, there could be one some where, but not likely by mercedes, i will order the product given by part number and see what arrive, i will let you know what i find. thanks for the information

Len is correct... a different product is used for de-oiling. I've purchased both from the MB dealer, they are NOT the same, and they do not do the same things to the cooling system. If you use a generic product for de-oiling, make sure it's low-sudsing... dishwasher detergent should be much better than laundry detergent. I would NOT bother with de-oiling unless you have a problem with oil in the coolant.

:book:

Dave - please read post #10. Why does Mercedes specifically make this statement? There's got to be a good reason?

Len

i ordered the 001-986-21-71 and it does infact say degreasing agent, does anyone have the citus cleaner part number available? i would like to order that and see what arrives

123 manual says to use a 10% solution of water and citric acid, tartaric acid or oxalic acid (sold by the chemical trade) with preference given to citric acid. I know that Mercedes does have its own part number for it, but I'm not sure what it is. I bought it at a pharmacy. Got a pound for about $7 I think.

Len

The citirc acid powder is 000-989-10-25 for a 0.5kg container, and I think you need two of those at a rather spendy $20/each, list price. The part number appears in the W124 acid flush procedure:

http://www.w124performance.com/docs/mb/OM60X/citric_acid_flush.pdf

:eek: