I purchased a used S430 from a dealer and the manual and the fuse box was not included. I am having trouble with my car doors. They won;t lock or unlock and the smart key lights up when I press the lock/unlock button. The interior button does not work now. There is no light when I press it. I think it may be a fuse. Yet I do not know which box or which fuse to check. Please help

Hello Everyone,
I see people have viewed it but no one has replied. Please lend you MB expertise in this area. Much appreciated.