I got AC problem leak freon with my E200 1991, and I do not know in where the leak. Anyone can help me how to check freon leak and in where usualy can be leakage ? and how to solve the problem ?

Right idea, wrong section on the forum, re-post it here and you should get a response very quickly

http://www.peachparts.com/shopforum/tech-help/

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1982 300GD Carmine Red (DB3535) Cabriolet Parting Out
1990 300SEL Smoke Silver (Parting out)
1991 350SDL Blackberry Metallic (481)

"The thing is Bob, its not that I'm lazy...its that I just don't care."