Smells like burned cables

[Charly Jazz]

Last week when loading the groceries in the sub trunk I found it smelled aslightly like burned cables, I couldn't figure out the source of it. I have been checking again from time to time and the smell it's getting stronger, but only in the subtrunk, so I can only smell it when I lift the trunk liner and lift the subtrunk lid.

Has anyone experienced anything like this? I have an appointment next week for an A/C sensor and I will have them check on it, however I worry that it could catch fire.

Thanks

 

[Nosken]

Did you install rubber mats?

 

[Charly Jazz]

I did install mats but they are not rubber, that was my first thought, but I have removed it to see if that was the cause but the smell is still there.