Jason Sottilo

2006 ml500. Wipers won't work in any position. Front and rear wipers. Wiper pumps do work though on front and back. Changed both relays. Nothing. Everything else in the vehicle is working as it should.... lost

Mercedesdiesel

Check fuse? Not sure if there is one. There must be though.

Maj. Dundee

What relays did you check and where were they located?

Jason Sottilo

The 2 under the hood. And yes, the 30amp fuse was changing out as well.

Maj. Dundee

Be more specific as to which ones. Were they A & B?.

Jason Sottilo

Yes

Maj. Dundee

Is the steering column plastic cover loose?

Jason Sottilo

No. And when I turn the rear switch wiper to on, the light on the dash lights up, but no action.

Maj. Dundee

Have you checked the wipers while in the rain sensor mode?

Jason Sottilo

Yes. And I have disconnected the rain sensor box and tried turning them on, nothing.

Maj. Dundee

Reconnect the rain sensor & spray water on the upper part of the windshield and take it for a short ride and see if it works.

Jason Sottilo

Do that while disconnected?

Maj. Dundee

I said reconnect the sensor.

Jason Sottilo

Oh, it's been reconnected and rained on since quite a few times.

Maj. Dundee

Grab the steering column cover with both hands and try to turn it, BUT DON'T GO CRAZY doing it.

Jason Sottilo

Actually, now that I think about it, when I use the column shift, the whole plastic casing does shift about a 1/2" when shifting.

Maj. Dundee

You must remove the steering column module and check to see if any electrical connector is dislodged. You must have tools.

Look at this video and see if you can do it.

Jason Sottilo

Will do. Thank you!

Maj. Dundee

Do this first to see if the module cover is broken. The bolt that holds the module in place has a groove that the bolt sits in. Center the cover and with a T27 extended Torx bit, turn the bolt a bit and feel if the bolt is in the groove. Then turn the bolt a little more and feel again.