Exposure time is moot if the subject is stationery and using a tripod. f/11 @ 1/8" or f/16 @ 1/4" or best f/22 @ 1/2" will accomplish your goal.
Depth of field -- from the point focused upon --- zone of acceptable sharpness is 1/3 back towards the camera -- 2/3 away from the camera. Likely the red button on the dash near the steering column.