I have a 2010 Hyundai Elantra with about 93,600 miles on it. Originally it was my mother's car (she was the only owner) but I got it off of her back in April. She for the most part kept up on the maintenance, but there is an odd issue where the interior dashboard backlighting and radio and console area lights will turn off randomly when driving. If you "flick" the dimmer switch on the left side of the console, it will come back on. None of the other lights have an issue, it's almost like there is a short, or a wire is not grounded properly for the dashboard and console lighting. If the radio is on it remains on, and the car never has an issue starting. It also should be the original battery (about 6 years old) and every other time I get my oil changed I have my mechanic check it out to make sure it is working okay.
The issue is very random but annoying, I have saved up some money and I want to get it taken care of for safety reasons (it makes it hard to drive at night or early morning). Since I am more of a computer nerd and have never worked on a car, I wanted to know what are some logical things to check ? I was looking around and most issues with dimming and flickering lights also talk about other electrical issues like the car not starting or turning off, I don't have those problems.
Also, there is a rare but light "burning stinky smell" from time to time, which I read could be related to an alternator belt or faulty wiring. However, I do need to get my oil changed (I am 1000 miles over) so I was thinking maybe that is the smell I am smelling? Also my mother brought up a good point that I have not needed to use the heater all summer (since it has been hot) and it could just be that I am smelling the heater, it tends to smell the first couple of times you turn it on for the fall / winter. That would explain why the smell is rare since I don't use the heater that often.
What are some things I should have the mechanic check out tomorrow ?