A6 Quattro Sedan V8-4.2L (BVJ) (2007)
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Remove the bolts - arrows - and the cover from the E-box.
CAUTION!
The heater pump valve unit to the left of the E-box becomes very hot during operation or when the ignition is on.
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Carefully pry off the retaining clip - 3 - with a screwdriver - arrows 1 and 2 - and remove the ECM from the E-box.