Anyone try flushing the transmission through the cooler lines. I was thinking of just unscrewing one of the transmission cooler lines, overfill the transmission with new fluid, start the car and wait until new fluid starts pouring out.

Good idea on an older 560SEL?

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2001 E55

2001 E320 Sedan

2001 Subaru Legacy

2006 SLK280

2016 Subaru Outback 3.6