I just purchased a car 10 days ago. I noticed

Apologies for not getting back to you sooner, I experienced some temporary connection issues and could not get back on the site until now. All appears to be resolved now so I can continue dealing with your query. Removing the entertain system yourself should not affect the ability to claim a refund for the car in general because you are not doing any major structural changes to the vehicle. However, it would depend on whether any noticeable damage has been done by you removing the system. If it is a simple matter of unclipping it from its brackets and unplugging the connections at the back, then obviously there is no risk of damage and it would be unreasonable for the seller to argue that you have tampered with the car to such an extent that it is no longer the car that they sold to you. However, if the system was inbuilt and would require more extensive work to remove it, risking any damage to the interior, such as cosmetic damage or any other damage that would be difficult to fix, they could try and claim that you have been negligent in your actions and the vehicle has been tampered with to such an extent that it would be unreasonable for them to accept it back. However, I would not expect the removal of an entertainment system, something which is usually self contained and only requires minor work to be removed to result in such drastic changes that the car would be adversely affected to such a degree. Also you have the seller’s approval to remove this yourself and as long as it is done diligently and with care, it should pose no issues. Suggest you take some photos before you remove it just to have evidence to show what it looked like before and after the work was done. I hope this has answered your query. I would be grateful if you could please take a second to leave a positive rating (3, 4 or 5 stars) as that is an important part of our process and recognises the time I have spent assisting you. If you need me to clarify anything before you go - please get back to me on here and I will assist further as best as I can. Thank you