2010 Mercedes-Benz C300 4MATIC Questions

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the car lights will also come on even when the car is turned off and the lights are turned off

So what steps shoot i trouble shoot

years. Also, it has disabling front end damage in 2010, repaired by Mercedes. Should I buy
without service records and without bumper to bumper warranty for at least 3 months?

The manual only says to drive careful and to take it to the dealer. Is there something I can do?

I can turn it on and off but the brake lights still wont shut off. I believe it has to do with the brake light switch but i couldn't find it under the dashboard where the brake is. Any clue where its located or what is the real problem? I didn't want my battery to die out so i removed the bulbs in the back. is that okay also?

my navigation systems miss reads the current location of where my car is. Example if i am in nj it will read staten island.

dealer says valve stem seals

how to change the right side lower beam head light

I'm new here :)
Can anybody help with instructions, diagrams on how to replace interior bulbs and license plate bulbs?

Many thanks!