Intermittent Wipers work sometimes

I have been having a problem with my intermittent wipers ( all other wiper functions operate as normal)... sometimes it is a very brief delay(1 second), sometimes it completes a "double-wipe", and sometimes the delay is 30 seconds or doesnt work at all. Is there a relay (potentially faulty) that controls the wiper delay? Could that be the problem? Or could it be just a bad contact somewhere? I've had my '94 C220 car for a month and just noticed this problem because it hasn't really rained around here for a while. Thanks in advance for any tips.

[280CEBoy]

If your car has the rain sensing function, have the sensor checked...I had mine replaced at 20k on my 230...oh.....did you happen to have the car washed recently before this happened?

[David C Klasse]

It's your wiper.hazard relay. Mine did the same thing. I almost ordered a new one... but I realized it started working again after I took out the relay and then put it back in. Open up the fuse box cover (under the hood), and then remove the 6 phillips screws that hold the covering to the fuse bock (and panel directly behind, same panel). It is a black relay behind the cover behind the fuse panel. Don't recall the part number. Do a search (I have asked a question about this before), or ask Phil (888 #) or search FastLane or PartsShop for the part number. Try moving the relay around with the INTERMITTENT wipers on, and see if they turn on. Just play around with it a little. If you can't get it, you'll have to order a new relay, I think about $75.
GOOD LUCK!

I didn't know there was a rain sensor. Is this standard on all or an option?

[David C Klasse]

There is NOT a rain sensor on your car.
You didn't list your model car (C220), so he thought you could have a sensor, but it wasn't available.