What is the best way to actually get to the lens? I assume that I will need to remove the unit from the car and then dismantle it in some fashion.

How does one clean the heads without getting them out of alignment? I have heard that this is a possibility.

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Semibodacious Transmogrifications a Specialty

1990 300D 2.5 Turbo sedan 171K (Rudolf)
1985 300D Turbo TD Wagon 219K (Remuda)

"Time flies like and arrow, yet fruit flies like a banana"
---Marx (Groucho)