Original owner has lost Manual 4 now, so how can radio be activated till then.

Radio codes emailed to you from this link: Radio Codes United Kingdom Gumtree

If the radio requires a code to activate it you will need to go through a dealer get the code for your specific vehicle if it is still in their data base. You will need proof of ownership and the vehicle VIN. There is no generic code you can use or a way to bypass the security system which is why we have the system to deter the theft and sell off of our car radios by that band of complete low life rat bags out there who would rather steal the property of hard working people than work for a living themselves. .

Codes are not included in the vehicle owner manuals either they are supplied to owners separately.