hello merc fans .turned on w126 300se otherday as car is not driven much.when i turned on headlights the wiper washer system on the lights started to work by its self and only stops when i turn lights off.so i had a look in fuse box to make sure two fuses were not crossed but no luck.any body got any ideas would be greatful .ps. do they run through the same realy and if so where is it. thanksagain.