when bleeding air out do i loosen injector lines at ip or at injectors

Injectors, but filter fittings first.

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Charles
1983 300D, bought new, 215k+ miles, donated to Purple Hearts veterans charity but I have parts for sale: http://www.peachparts.com/shopforum/mercedes-benz-cars-sale/296386-fs-1-owner-83-mb-300d-turbo-rebuild-parts.html

thanks got it started,claw foot 17mm makes job easier.