Mercedes-Benz R-Class 2006 Owners Manual - Manual (Page 475)

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Practical hints
Replacing bulbs
License plate lamp
1 License plate lamp cover
2 Screw
̈ Loosen screws 2.
̈ Remove license plate lamp cover 1.
̈ Replace the license plate lamp bulb.
̈ Reinstall license plate lamp cover 1.
̈ Retighten screws 2.