"Please,Help me stuff this elephant through a 2 inch PVC pipe."
'Always walking a Fine Line trying to clean a older
"Not so Nicely maintained,by the P.O. s " cooling system.

Too Aggressive a "De-Oiler" or "Cleaner" and afterwards you may get the
"Surprise" !

Correct me if I'm Wrong,
Cascade's an Automatic Dishwasher Detergent
[AND, here's the Kicker,STERILIZER.What additives are used to Sterilize???]
That damn dishwasher in the Kitchen is purpose built to withstand DWD,
the Mercedes ain't.
(Could, by any stretch of Chemistry,DWD be considered Corrosive?) YES.
My concern would be the Harshness of the Cascade package on the combo
of Metals used in MB cooling systems.
Then once the Cascade has weakened the finely aged metallic portions of
the cooling system.Citric acid applies the "Coup de Grace".

I am in the middle of the same battle...
The "Y" pipe (Metal) that feeds the 124.128's Coolant Reservoir Tank
has some nasty CORROSION internally
(Fools of P.O. s using GREEN COOLANT)
MB wants over $100.00 USD for the pipe.I'm gonna clean it,and then decide.
(Well,Actually there's 3 or 4 more Metallic pipes in the system.'Afraid they' ll
have to go Too.)
[and as a result I'm Cogitating over the condition of the Heater Core innards that I can't see.]
The Radiator...ain't no question,It's History.It is an Original from Sindelfingen,
without the metallic reinforcements at the necks.No Telling what's inside it.
The Engine and Water Pump/Thermostat are new, no Corrosion worries there.

__________________
'84 300SD sold
124.128