just look at all sides of the resovoir. I think you have to look at the side facing the engine. if you put your hood up all the way this is easier. to fill you just let the fluid flow over the chamber wall. i jiggled the resovoir a little bit.

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1984 300SD Orient Red/ Palomino
1989 560SEC
2016 Mazda 6 6 speed manual
1995 Ford F-150 reg cab 4.9 5speed manual