As of yet I still have not changed it -- and might not get the chance until this weekend.
Nonetheless, despite the hot weather in VA and the stop & go traffic of my daily commute with A/C on full blast, the detergent mix is doing an astoundingly good job of keeping coolant temps below 100. I am frankly amazed and will leave some soap in when I flush/refill the system.
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2008 E350 4matic / Black/Anthracite
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Gone but not Forgotten:
2001 E430 4matic, 206,xxx miles, Black/Charcoal
1995 E320, 252,xxx miles, Black/Grey
1989 260E, 223,00 miles, Black/Black
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