Touareg V8-4.2L (BHX) (2004)
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Follow lines to individual air spring damper (where accessible without major disassembly), to check for any leaks or kinks in lines.
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Repair any lines kinked or leaking.
Air spring dampers, 12 hour leak down test
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Put car in regular auto driving level.
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Start and idle engine for 10 minutes with doors and liftgate closed.
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Stop engine and switch OFF all electrical consumers.
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Disconnect air suspension control module electrical connector (right rear quarter).
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Record height dimension at every wheel opening.
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Let vehicle sit with doors and liftgate closed for the next 12 hours.
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Measure wheel openings again to see if suspension has lowered.
Tip:
This measurement must be taken at similar a temperature (+/- 5 °F).