More photos with comments on installation; Trunk mounted amplifiers and 5-farad capacitor; Note:
routing of all wiring was done through 1.125" (1-1/8" holes) drilled into the lower section of fuel tank cover assy and installed 1-1/8" grommets to prevent wire chafing. The panel must be removed to do this type of install as the fuel tank is immediately behind it!
In my installation, and because the panel itself is contoured with the highest point in the center, I used strips of 3/4" MDF with a 15 degree angle cuts placed horizontally across the top and close to the bottom to create a "flat" mounting surface on the outside of the panel for my Amps and Caps be secured to and also to further enable spacing of the components away from the surface of the panel itself.
As to space for wiring bundles,, there is sufficient clearance/space behind the panel at both the top and bottom (when the panel is in place) for wiring to lay safely away from the fuel cell/tank).
I also enclosed all wiring (speaker wire and RCA cabling) behind the panel using flexible conduit as an additional safeguard. Note: re-installing the panel is one of the last/final steps in completing your install as you want to ensure all wiring is correctly laid out, in place and to prevent chafing.
Note: the reason the capacitor is positioned at a lower height than the amps is to permit the battery compartment door/cover to open fully.
Overall, IMO, this type of install (vs mounting to the floor of the trunk) presents a nice clean installation and finish that does not obstruct the utility of the trunk space. Lots of wire
- so if your contemplating an install similar to this one - be sure to factor in the amount/length of each wire pull plus some reserve on each. Also don't forget that most CD-Recievers/Head Units have a separate remote wire the runs to the amp(s) and serves to signal the power on/off to the amp(s) such that when you run wire (i.e. speaker wire/RCAs) you need to pull an additional wire (i.e. 16 AWG) from the head unit to the trunk for the purpose. (in my case I forgot it, and had to repeat a pull only after having put all my panels, kick plates, etc. back in which I had to R&R once again. Wire Pulls
- also noteworthy: the Battery power cable in the 560SL along with some other OE wiring is run on the passenger side such that you'll want to run your audio system wires (i.e. speaker wires/RCA cables) down and along the driver side. This is due to both space limitations and to avoid interference from the battery power cable).