The CAC should be accessible by you.This all depends on each individual build of the coach. Some setups will provide more visible access to those items. Some, like mine, is pretty much impossible unless one modifies the fan shroud. And, even doing that, you have to lay on your gut on boards that are spread between supported components. I have two access panels on mine, a large one that's about 40" x 40" or so and, one that's farther back towards the rear that's about 18" x 40" or so. But, neither one provide "EASY" access to either the front face of the CAC or, any portion of the radiator that isn't covered by the CAC.
In the picture below, yes, the "top" of the motor is exposed but, unless I cut a hole in the top of the shroud, which quite a few have done, there is pretty much ZERO access to the important sides of either the CAC or the radiator. And, even with a hole cut, I'd be extremely limited to be able to effectively clean the entire square inch surface of at least the CAC. One of these days I'll cut that hole.
Scott