My 1994 S500 W140 Left side turn signal blinks continuously, it only stops when I turn on the right one and the right one is blinking. Turn the wheel or center the switch and then the left comes on again. Can anyone tell me which relay or part could be the problem.[align=left] [/align]

 

Check the bulb sockets, or bulb holders. I am not sure what they're called, but they may need replacing. Then again...maybe you need to replace the bulbs themselves. I know...sounds strange, but stranger things have happened. This is least expensive. So, check anyways.