I have a leak on the right hand (us passenger) side of my w12. It is definitely coming from the auxiliary cooler just in front of the wheel/wheel arch. What is that part called? I have looked up the part number printed on it 4E0 121 212B and come up with only coolers that have a “stacked” design on the left side of it instead of the “pass though” style mine has.
Mine has two fittings directly across from each other on one of the tanks and on the right side of the cooler a single (inlet?) near the top right hand side of it.
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