Banging on the roof.

A totally weird experience with my Conny.

I have fitted a Chinese Double Din Unit, which works brilliantly and is totally irrelevant to the issue I am having, I THINK!

When the weather is below 0 degrees C I find that the car has lost its radio memory, when I actually start it, which it does well with no hesitation, I then get, what sounds like, 3 knocks on the roof as soon as the car starts. It is so loud that I actually someone was banging hard on the roof.

The car runs fine and there are no fault codes showing.





Any ideas appreciated. Thanks.

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