w203: Auto Wipers not auto-wiping?

[louisv6]

Hi all,

My w203's wipers don't seem to automatically sense rain, as one might reasonably expect rain-sensing wipers to do.

Some very quick testing showed that:

If left in the I position (the first one that's not off), and then the engine started, the wipers won't move until water is dumped over the sensor in the windscreen.

Once the sensors have decided to move the wipers, there's no change in behaviour (i.e. they keep intermittently wiping) regardless of what happens, and whether there's water or not, unless the engine is turned off, or I manually switch to II or III (which obviously isn't regulated by the sensor).

No amount of rain will make the sensors move the wipers any faster than intermittently when the switch is in the I position.

So my brief testing seems to suggest that the sensor does *something*, but nothing terribly useful.

Anyone got any ideas?

 

[BlackC55]

I suspect the sensor is faulty. A check with a Star should show up the problem

 

[renault12ts]

Mine doesn't work either. The default is to act as intermittent wipers.

 

[lynall]

Leave in intermitent position and when ign switched on they should do one sweep of the screen.

I personally would prefer std intermittent as they are very hit and miss.



Lynall

 

[louisv6]

Thanks for the star tip. I guess that's the Mercedes equivalent of VW's VAGCOM?

I took my car in recently and all sorts of errors were shown on the diagnostic sheet (output from their computer), but I was told that they weren't anything to worry about, so I'll take a bit more of a detailed look at that.

 

[prc]

Thanks for the star tip. I guess that's the Mercedes equivalent of VW's VAGCOM?

Yes, but the one and only. Proper mercedes one
VW's have quite a few around beside the very popular VAGCOM.

BTW agree with everyone..faulty sensor