My son wrote these on the front door panels with blue ball point pen. Attached the images. Could you please tell me how to remove these marks? Or how much it would cost if done by the dealer?

 

Try a little 70% isopropyl alcohol (either buy a bottle or use the little pre-soaked squares sold in pharmacies (just a few dollars)- I would never take it to the dealer for this, otherwise prepare to be ripped off. Ball point pen should come out pretty easily. Don't use anything abrasive either.

 

This will take it off, but it's probably best as a last resort. It may fade the panel. You could very lightly apply it to test a small section and immediately wipe over it with a wet cloth.

Cooper's D-INK-4OZ D-Ink, 4 oz Bottle, Genuine (S5780)

 

do not use hair spray! It'll damage the finish!

You can try using water mixed with woolite 6 parts water: 1part woolite.

Gently rub it in with a MF towel and it should come out.

 

If the above doesn't work I'd try this as a last result.

Mr. Clean Magic Eraser.

I had to use it on my TL for a few marks on the interior and it works great. You'll want to use very light pressure and as little passes as you can as it's an abrasive material.

 

I used Goo-Gone, but just a dab sprayed into a tissue and then rinse it with water once the marks are gone. Whatever chemical you end up using to remove the marks, just wipe it off at the end. Don't let it soak inside.

 

Goo-gone on a towel, then wipe it clean with just a wet towel, and to prevent it happening again, sell the child.

 

I used this method:

Use Hairspray to Remove Ink from Fabric in a Pinch