You don't have to take it apart. Look at the front of the CCU, just above the buttons. You will see two innocent-looking pieces of black tape. Under the tape are holes in which two bulbs live. Use a piece of tubing to capture and pull out the old bulbs. You may have to experiment to find the right size tubing.

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"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970