I wouldn't put the crush washers in the "if needed" category.
ALWAYS replace and NEVER reuse these. That's the design intent.
This applies to oil pan drain plug washer, too.
German cars are different than American cars.
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Kent Christensen
Albuquerque
'07 GL320CDI, '10 CL550. '01 Porsche Boxster
Two BMW motorcycles
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