Correct answer
A damaged cylinder-head gasket allowing the circuits to communicate.
A damaged cylinder-head gasket may fail to seal passages correctly and allow coolant into the oil. This is a possible cause to confirm by diagnosis, rather than an automatic conclusion from any water presence. Correct the problem before continuing to use the engine, because contamination can impair lubrication.
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Tyre pressure below the specified value.
A damaged cylinder-head gasket allowing the circuits to communicate.
Incorrect headlamp height adjustment.
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