A co-worker has the C-320, and the dealer quoted her $385 to change the
spark plugs. I thought this was insane, so I told her I would take a
look. I couldn't remove the big plastic cover over the engine! The
front lifts off, but doesn't come off, and the back and sides are on
Is there a hidden set of screws? How does this thing come off?
Also, are there 12 plugs, attatched by a strange set of ignition wires,
making the task of changing the plugs a 3-hour ordeal for the dealer?