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2014 CLS63S SB
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1,159 Posts
Discussion Starter #1 (Edited)
Had my 140 for just over two years now and when I bought it the guy gave me 3 months warranty, (which he honoured when the tranny became jerky and necessitated a £1200.00 repair with a replacement valve body), and he also put 12 months MOT on it.
Now tranny issue aside it's run virtually faultlessly all those 15K miles ago.
Anyways, after the first year of ownership the first MOT comes around and the tester says to me that it's all good except that there's an oil leak from the engine. I decide to investigate but stop after about twenty minutes after finding nothing.
The car isn't smoky and doesn't appear to be consuming any oil at all-so I forget about it.
After year two of ownership the next MOT comes around and from a different test station I get the same diagnosis but don't pay it much heed.

Anyway two days ago I decide to change the oil, plugs and filters. So I've been out for a drive and while I am waiting for the oil temp to reduce so I can Liquivac it, I decide to change the spark plugs, (for Champion EONs). The right bank first. No problems here. Now for the left bank..............
Three out of the four plugs here are so loose they wiggle slightly when I put my finger down there, and the silos-for want of a better term, are full of oil. Of course all the oil dropped into the cylinder when I pulled the plugs. Still, I put the car back together and took it for a spin afterwards. It produced the biggest cloud of white smoke I'd ever seen for about 30 seconds then it was clear again.

My point to this story? Get yourself a few basic tools and with regards to any routine maintenance IF YOU CAN, DO IT YOURSELF. You'll know exactly to what standard everything has been done.
 

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Premium Member
1997 S600 (sold)
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4,660 Posts
Don't stop there. Get a valve cover gasket set and replace those leaky spark plug tube gaskets.

Agree on DIY stuff. If something gets screwed up, I want to be the one who did it. That way I know exactly what happened.

Brett
 

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2014 CLS63S SB
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1,159 Posts
Discussion Starter #5
Brett San Diego said:
Greg's web site contains some nice pics of removing the valve covers. Not really detailed, but probably enough info. There are basically O-rings to seal the spark plug tubes. He does specifically mention the spark plug tubes leaking.

Replacing Oil Guides by Greg Baxter

Brett
That guy is brilliant, as is his guide.
 

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Artic White 1995 S420
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366 Posts
Ok my power steering fluid is leaking all over the place and I dont know how to fix it myself. Does anyone know were I can find detailed instructions on this?
 

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2014 CLS63S SB
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1,159 Posts
Discussion Starter #7
Leaking from where exactly?
If you want a quick fix use a product called Auto RX. It's pretty good at stopping leaks and reducing noise.
 

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W639 Vito 110 CDI; Ponton 220S; VW Phaeton V10 tdi; 1995 S500 ex diplomatic car (gone)
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574 Posts
I have a 93 300SE head light lens I need to install but don't know how. Any advice?
V12uberalles covers this, but I found that you don't have to remove the whole light assembly. So long as you are careful to keep hold of the clips they are removable and replaceable with it in place...avoids having to realign it. Also if the glass is dirty inside it is annoying to clean properly. Put it through the dishwasher...squeaky clean! Use a little silicone sealant to waterproof the seal again unless you trust the clamping pressure alone.
 

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82 Posts
I agree do as much work as you can to save some money. :thumbsup:

My Mercedes Mechanic said that the W140 is the most expensive Mercedes to maintain-BUT IS THE NICEST MODEL!
 

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F250 7.3TD Mercedes Benz W140 S600 1996 119k k's(sold), MB W124 300E 1989 261k k's(sold)
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464 Posts
I'm sure gartracescort meant the silicon was to provide a seal and the removable and replaceable clips were to be replaced once the lens was back in place. The clips actually hold the lens on, not the silicon.

Good tip about the dishwasher. I polished mine by hand - quite hard to get the build up out of the grooves in the lens.

Won't be so much of a problem when I convert to a set of the projector headlights as my next project.
 

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2014 CLS63S SB
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1,159 Posts
Discussion Starter #13
SimonClaringbold said:
I'm sure gartracescort meant the silicon was to provide a seal and the removable and replaceable clips were to be replaced once the lens was back in place. The clips actually hold the lens on, not the silicon.

Good tip about the dishwasher. I polished mine by hand - quite hard to get the build up out of the grooves in the lens.

Won't be so much of a problem when I convert to a set of the projector headlights as my next project.
Those projector headlights are the best aftermarket mods I've yet to see for the 140. Can't find any for the coupe though. Bummer!
 
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