Inline Fuel Filter - MAHLE KL 915 - Car - Fits Audi A6, A7 - Genuine Part. MAHLE fuel filters reliably remove contaminants thanks to high-quality filter media. AUTHORISED MAHLE UK STOCKIST. Inline Fuel Filter - MAHLE KL 915 - Car - Audi A6, A7. MAHLE fuel filters reliably remove contaminants. Thanks to high-quality filter medi. Mahle Knecht KL915 Fuel Filter In Line 55mm Outer Diameter 248mm Height Service. Please use the compatibility guide as a reference only. Please double check all information in the listing. Variants are common so please check with us prior to purchase if you're unsure. Item in stock. 60 day return policy. Express delivery available.