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Ground/earthing Points; Location Diagram
Topic Started: Wed Mar 3, 2010 9:01 pm (6,612 Views)
cosser
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Here's a handy diagram for rooting out and cleaning up all of those pesky earth points on a 190..!!


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One thing I should mention...I've looked long and hard for W1...the one behind the Instrument Cluster with no success..could it be that this one is on the other side behind the glove box on a RHD car..??

I have a vague recollection of seeing it when I was fitting a new glovebox insert..??

Have Fun..!!

Cosser..!!
Edited by Chunk, Tue Sep 5, 2017 2:06 pm.
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Neil
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For the love of God, THIS MUST BE PINNED!
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cosser
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Its not For God....it's for anyone who doesn't know already...Sorry if I offended you...God...lol..!!

Cosser..!!

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1stMerc
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Excellent Post.
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cosser
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Hey 1st Merc,
even covered in snow...Its still the best colour....Smoke Silver forever.....lol...!!!

Cosser..!!
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einsi190e
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damn i worked on this today used sandpaper,and sanded all the rot/rust and put ant rust on it i can confirm i feel a diffrance as in starting,idling ,and especially the stereo
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stevie w
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Brilliant post.Very useful to know,especially when strange electrical problems start to happen.
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viffer
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The W1 earth point behind the clock cluster is behind the right hand side heater trunking, if you remove the trunking and then the soundproofing needs to be lifted to view it, several brown wires are bolted to the bulkhead. Of course it's easier to see once the cluster is out, been chasing down a minor electrical prob and noticed the earthing point. Thought it might be of use if anybody is searching, seems to be some confusion of its location.
HTH
Viffer
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bigkev1
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Where does earth w11 Earth to? Just anywhere on the chassis I presume
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Mercedes29
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Anyone know which section of the manual this is from? The links are broken but i have the manual they are from. Been looking through but cant find them anywhere!
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mika
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Ive dismantled and cleaned W11, W14, W10 and W3 as i was getting an occasional misfire and difficult starting.
Do i need to do all or most all of the others or is the earthing and associated issues specific to the area of the car? I understand others have had lighting problems so have cleaned up the headlamp earths but i wasnt planning on doing this just yet- (partly as the headlamps look a bit tricky to take out completely).

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this is at the front of the rocker cover
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this is underneath the coil (?) bit tricky to get at
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this is under the ABS
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this is to the right of the battery

Edit : checked W6 & W7 the two in the boot , i think W6 is linked to the electric aerial.
Edited by mika, Thu Oct 19, 2017 8:53 pm.
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mika
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Ive been running the car for a week or so since cleaning and tightening these earths - i didnt realise how important they are.
All of these looked fairly clean and fairly tight however the improvement after cleaning is very noticeable.

- starting has improved it was taking approx 5 seconds with an occasional pulse on the throttle now no throttle 1-2 seconds and it starts.
-used to miss a beat on tick over occasionally - gone at least for now.
-misfire and very occasional loss of power - hasnt occurred in the last week.
-electric aerial occasionally didnt go up or down - hasnt occurred in the last week.
I would encourage anyone to clean and secure theirs even if they look fine, it certainly has made a difference to mine :)
Edited by mika, Thu Oct 19, 2017 9:05 pm.
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optimusprime
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Are we sure this is a 190 e . It looks very much like the w124 to me .
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