Even the user manual explains how halogen bulbs are changed. The correct bulb types are mentioned too. In my opinion the blue and similar are just cosmetic that make the bulbs more attractive for buyers but perform worse.
My 05 CDI uses H7 halogen bulbs. The left bulb is a little harder to change than the right bulb on my car because of stuff in the way. It is a reach in, turn left and pull out. Don't touch the bulb with your fingers because it can cause a hot spot from the oil on your skin. Use rubber gloves. If you know how to do it, you can change the bulb in 5 minutes.
The Silver Star Ultra does indeed provide noticeably better illumination than a regular stock halogen bulb. My experience is also that they only last eight to ten months.
After replacing so many of them in my daily commuter Honda Civic, I finally decided to install a regular stock type bulb. If your MB is your daily driver, then carry spares, and be prepared to replace the Ultra bulbs pretty often.