C30 T5 L5-2.5L Turbo VIN 67 B5254T7 (2008)
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Locate the grey 2-pin and green 5-pin connector under the corner of the spare wheel well.
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Then pull up the spare wheel well as far as possible for better access.
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Connect the adapter wiring to the car's routed cables.
Applies to cars with a trailer module (TRM)
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Disconnect the green 5-pin and grey 2-pin connectors from the control module and connect these to the adapter wiring.