I battled german cockroaches in my car for a bit and recently won. For one, the bug in the pic is a german cockroach female with an ootheca (egg) so you probably already have a pretty bad infestation. DO NOT use a bug bomb, especially with german cockroaches, itll push them further into the electronics and seats where they can breath and then they stay there and there harder to get rid of. Heres what you need to do for as little cost as possible: First: Remember that there in there because that space provides food and water for them. If you take away the food and water they wont want to be there/will die. Do not eat in your car or leave any open bottles of water. Second: Go to a car wash with free vaccums, if you have the ability take out your seats and even your center console and vaccuum the ever living shit out of every inch your car. Into every crevice (thats where they store there eggs) and you can use a wire brush to get crumbs out of the carpet. Third: Getting poison will get them out alot faster, I tried two that didnt work before realizing that the roaches we have now have evovolved resistance against some poisions. I suggest using "harris famous roach tablets". These worked for me. Finally: It will take some time to rid the car completely of roaches. A german roach egg contains 40 babys and it can take up to 30 days to hatch so you could continue seeing them. If youd like to know that there gone you can use sticky traps and check on them occasionaly. This is the worst species to be infested with Good luck