First you have to take off the panel that covers the screws behing the CCU. Mine is black plastic, I have seen others that are wood, it just pops off with a flathead screwdriver.(be careful not to break the panel, cracks in it dont look too nice).

Next, there are two screws at the right and left corners that you unscrew to take the CCU out. Dont take it completely out but enough to get your hand behind it.

You should then see the wiring to the blubs, there are four of them, on the top of the CCU. There is a fifth a bit down the wire, not sure if that is the fiber optics or not. You can just pop the bulbs out with your hands, but when installing the new make sure not to touch the bulb as it will wear out faster. Just pop the bulbs back in, screw the CCU back on and put the panel back on and your done.

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1980 300D European
"The Red Fox"
200,000 miles

2003 Chevrolet Silverado

609 Certification