I would like to solicit the help from the many experts out there.
I have a 2005 ML350SE. My problem began recently after the vehicle has sat for about 3 months. The problem began with windshield wiper creeping up about 1/4" increments, it will do a full sweep when it reaches the 1/3 mark. The wiper switch is at OFF position.
Next, the horn will toot ever so slightly randomly. The sound is not at full level, but rather sound like a light tap. It will honk several times each time when it honks. I checked the contact, spring, wiring, everything is normal.
Finally, my door lock will make a ticking noise, but at a faster pace than a clock's tick. It seem that the lock is trying to acuate, but failing.
All these problems seem like it's casued by micro electrial pulses. I have checked the fuse box and rotated the relays to troubleshoot and eleminate the possibilty of a bad relay.
My next step will be taking it to the stealer to have them check it out. I just wanted to know if anyone out there has experienced anything like this. Any help will be greatly appreciated.