To my recollection, you will need to set/move the pointer to the sharpest part (right mark) of the triangle marker. Then, you will need to tighten the 13mm nut until the pointer moves to the widest part (left mark) of the triangle marker. Last, tighten the 19mm nut after you have set the pointer to the correct mark. Hope this helps!

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200 75 W115 (Mom's)
190e 90 2.6 W201
E320 95 Wagon W124
72 BMW 3.0 CSI