Accessing the fuse box relays on a W140 - PeachParts Mercedes-Benz Forum

tower · #1 08-28-2004, 06:24 PM

I need some help. After removing the 4 screws that cover the front of the fuse box, I still am unable to remove the cover to access the relays. Need some help here....is it suppose to slide, or are there more screws I haven't located yet? (95S420)

My front headlight washer/wipers aren't working. Before today the drivers was working (wiper) but the passengers not. Now I've got no power at all to the passenger side (lighting or headlight circuit) and need to get at the headlamp/waher relay to check it out.

All comments welcome and appreciated.

Ron

tower · #2 08-28-2004, 08:57 PM

Bump!

Come on guys! Does anyone know?

DanielW · #3 08-29-2004, 02:05 AM

The under hood fuse box is located on drivers side (L) near firewall and hood hinge. It has no screws, but a simple lift latch and then pivots up on two forward tabs. Houses ONLY fuses I think (it's been a while since I looked under there). Start by checking fuses first. Sorry if this is no help. DanielW

tower · #4 08-29-2004, 08:11 AM

Thanks DanielW. You are correct that access to the fuses are via the locking cover, but behind the fuses, in the fuse box, are a number of relays that are accessed via removing the lid of the fuse box. I can see four screws that hold the lid down at the front of the box, subsequently removed, but the lid now fulcrum's from the back. Cannot seem to break it free and don't see any screws that hold it on. Probably right in front of my eyes, but just not noticing it anywhere.

Subsequent reassessing the circumstance, I now have power back to the headlight washer/wiper system. Fuse 7 (right side parking lights) had blown during my testing stage. Why?? I don't know. Will continue to debug. I see that a similar thread to my problem was started on benzworld.org which ultimately became a "replace passenger side wiper motor" solution. My problem appears to be identical so it may resolve itself to that.

Ron

Gilly · #5 08-29-2004, 08:40 AM

This may help, it may help to shoot a photo of that area too:
Few different things I remember:
There may be a "sliding latch" to pop that rear cover off (the rear one is the one you want, I'm not talking about the one to just get to the fuses; I know exactly what you want to do, OK?). On SOME of these cars you may need to remove that one extra module that sits on top of the rear cover. Then you see to big ridged ^-shaped knobs which slide forward (upside-down Vees).
Alternatively there may be a "paddle" shaped lever on top of the rear cover which pulls upward. Kind of shaped like this: \_/
I don't think the screws are helpful to you at this point, it's a release mechanism.

Gilly

tower · #6 09-22-2004, 05:46 AM

You hit it right on the head. Quite the locking system for just a cover.

Just wanted to close the thread and say thanks for the information.