I believe your chassis is known as W126, and I think if you do a search of the site for clear blinkers you will find what you are looking for, at both ends of the car.
There should be plenty of instructions for dash disassembly as well if you try a search. I was a little unclear on the amber lights you want to change to blue xenon types and their connection to the dash. What is in the dash you want to get to?
Hope with a little more information you can find what you are looking for on the site. Jim
1986 Euro 190E 2.3-16 (291,000 miles),
1998 E300D TurboDiesel, 231,000 miles -purchased with 45,000,
1988 300E 5-speed 252,000 miles,
1983 240D 4-speed, purchased w/136,000, now with 222,000 miles.
2009 ML320CDI Bluetec, 89,000 miles
1971 220D (250,000 miles plus, sold to father-in-law),
1975 240D (245,000 miles - died of body rot),
1991 350SD (176,560 miles, weakest Benz I have owned),
1999 C230 Sport (45,400 miles),
1982 240D (321,000 miles, put to sleep)