i have a 1999 c230 komp. the turn signals,horn,radio,wipers all stopped working at the same time. someone help me please.

I had a C230 and I know how reliable they are so this should just be a matter of finding a bad fuse or relay or loose wire.

First thing is you should have two fuse boxes, one in the trunk and one on the engine compartment. When you take the cover off the fuse box, stuck in the inside of the lid is a paper listing fuse resistance and location (all by numbered location) look to see if one fuse has all the problem components listed to a single fuse- that's the first step.

Actually this wouldn't be a bad time to change out all your fuses.

Next check to make sure the battery in the trunk has both terminals securely attached without any corrosion on the terminals. A weal battery can reveal itself in strange ways - any battery older then four-years can be questionable.

Also if you have a rain sensor in your windshield some of the electronics for that are in the overhead light console above the rearview mirror and the horn and turn-signals are related to the alarm system so keep that in mind while searching for which fuses are involved.

Read in the owners manual about the fuses.

__________________
1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra

i will change all fuses inspect wiring, and get back to you. thanks DON