Get these ones with brass end sleeves 2 Mercedes Hebmuller Fuel Filter Inline w Brass Ends Upgrade 0 450 904 077 | eBay

These are hard to find and superior. Unlike the ones w/o the brass sleeves, these won't let air in on the suction side.

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85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked