Where can I obtain the electrical/wiring/general wiring schematics for a 1999 clk ? My apologies if they are sold through this forum (I looked but could not find anything this current). I will be having some mods done and would like to provide as much info as posssible to the techs/engineers as possible.

You will have to purchase the factory manualls through a dealer. They are expensie that way. What mods are you doing??