I use the orange turbo power coolant diluted with 40% water. No problems with it so far. I think it's supposed to have a rubber protector in it as well, but I'm not sure on that one.

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All it takes for evil to prevail is for good men to stand by and do nothing.

Too many people tip toe through life, never attempting or doing anything great, hoping to make it safely to death... Bob Proctor

'95 S320 LWB
'87 300SDL
'04 E500 wagon 4matic