Hi , new to the forum , some great info flying around. I run a 98 ML320 here in the UK and have suffered from most of the common complaints I have seen posted up. My current aggravation is failing windscreen wipers. They just stop mid use and then start again ? Quite dangerous at 70 mph !! Any ideas ??

Not that I will have a brilliant solution to the problem but, does the cycle consistently stop at the same position and, if so, where? Also, how long are the stops?

From what I can see , it appears to stop mainly in the intermittant mode and starts again roughly after 10 mins .

Dave -- is this an accurate synopsis of the problem?
- wiper motion never stops prior to three complete cycles after the switch lever/stalk is released when the wash mode is selected
- occasionally, wiper motion stops when the switch is set to either slow or fast continious wiping
- frequently, wiper motion stops when the switch is set to intermittant wiping
- when stops occur, the blades are parked in the normal position at the bottom edge of the windshield
- stops generally last about ten minutes and motion is resumed without any manipulation of the switch stalk.

Please correct any of my mistakes in this synopsis and add anything else that you can think of - if necessary, after your next drive in the rain.
I'll be out of town until the end of the month but in the meantime, it would be helpful if another member could chime in about where the timing function of the wipers is located. I can find nothing in any of my materials. Is it located in the combination switch on the steering column; at the wiper motor; or, in some control module? Surely, wiper control is not done with digital signal!

Geoff

AAM I believe is responsible for that (All Activity Module, located under the fusebox). MAY be a relay in the fusebox the AAM controls for this function.
What I remember is motor problems with these. If you can get it into a failed state, you can try tapping the motor with something like the handle of a hammer, you can pull up the front of the black plastic mesh screen to access the motor. If the wiper starts working after a few taps, it needs a motor

Gilly

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Thanks fellas , just to confirm this is not related to wash wipe . These wipers stop whilst in use on both intermittant and normal wipe. When this happens I leave the switch on fast wipe waiting for it to resume , which it does after a period of no longer than 15mins.
Also I dont know if replacing the relay will help but the wiper action is quite poor , it passes below the resting place before parking 1 inch higher on a stop start motion instead of a continous smooth motion. Maybe related ????