Hi. I would like to give a cooling system (1984 M110 engine, all metal radiator) a good flushing, and I've heard folks recommend a "citric acid" flush. I've got the MB p/n for the product (# 000-989-10-25), but when I went to buy it, they told me to be sure to also use an alkali neutralizer afterward. However, they didn't know what to use (they said they haven't used a citric acid flush in years) for the alkali treatment.
Does anyone know anything about this second step (what to use, how much to use)?
In advance, thanks.

Oh maybe a cup of sodium bicarb in a couple of gallons of warm water, then a good flush with clean water.

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Jeff Lawrence
1987 300e
1989 300e
1987 BMW 325

A dealer that doesn't know about products that MB requires on coolant flush every 2-3 years has lost touch. Just mix (powder) with warm water & run engine 20-30 min & then flush with water. Not much acid in this formula.

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MERCEDES BENZ MASTER GUILD TECHNICIAN
ASE MASTER TECHNICIAN
27 YEARS DEALER M.B. Shopforeman
190E 2.3 ITS RACECAR
1986 190E 16V