S4 Quattro Cabriolet V8-4.2L (BHF) (2008)
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Remove fuel return line - arrow - from locking flange (left vehicle side).
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Attach adapter (V.A.G 1318/7) 1 on return line.
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Use Hose Clamps Up to 25 mm dia. (3094) to clamp adapter (VAG. 1318/17)1.
‹› The Hose Clamps Up to 25 mm dia. (3094) may not set directly on the fuel line - danger of damage.
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Start engine and run at idling speed.
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Switch ignition off once pressure has built up. At the same time, close cut-off valve of pressure gauge (V.A.G 1318) (lever at right angle to
direction of flow).