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1990 300SEL, 2005 SL500
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17 Posts
Discussion Starter #1
First 3k+ km already added to the original mileage.

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The only thing done to it after the purchase was the oil change.
Good all Benz pass with flying colours. That’s not to say the car is flawless. There is plenty little things that would probably annoy the driver of a modern car. The key here is to learn to except the things the way the are at the moment and slowly try and correct them.
 

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1990 300SEL, 2005 SL500
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17 Posts
Discussion Starter #2
First leak down test.
No not that one, not the engine.
We had a nice sunny day so I took the car through the soft touch car wash to get all the grime and dirt of it. Not a drop of water anywhere. Excellent.👌

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and it looks better too. Doesn’t it?
 

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1990 300SEL, 2005 SL500
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17 Posts
Discussion Starter #7
It’s sitting at 237,000km. All original except the maintenance items of course.
Im already thinking about that MB 250K badge.
 

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Registered
1977 W116 450SEL and 1988 W126 560SEC
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424 Posts
I’m making a list of maintenance items to purchase.
With regards to spark plugs, Pelican still has the genuine parts listed.

Mercedes-Benz Home > 1990 Mercedes-Benz 300SEL Base Sedan > Basic Maintenance > Spark Plugs
Mercedes-Benz Spark Plug - NGK TR5 (2238) - Bosch HR-9-DC - Genuine Mercedes
Are those the none resistor plugs?
Usually if there is an "R" in the spark plug manufacturer's P/N, it has a resistor. I bought NGK BP6ES and BP5ES from a local supplier in the past. Where in Canada are you?
 

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1990 300SEL, 2005 SL500
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17 Posts
Discussion Starter #11 (Edited)
I took the rear passengers door panel off today. I could not believe what I saw.
You be the judge.

2620651


Yes this is the factory vapor barier. 30 years later still looking like it left the production line just yesterday.
That slightly yellow part at the bottom is the glue.
 

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1990 300SEL, 2005 SL500
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17 Posts
Discussion Starter #12
One more pic of the door,

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German quality after 30 years!

In this picture you can see clearly why I had to pull the door panel off.


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The grease you see is soft and spreadable.
 

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1991 300SE, 2015 ML350
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44 Posts
Get used to doing that sliding-jaw job on the rear windows if you lower them very much. I like to cruise with the windows down whenever possible, and I've replaced probably 10 of them in the last 30 years. Some guys drill the old rivet and then fab a bolt/nut to repair it without removing the whole mechanism each time, but I just take my time, pull it all out and peen in a new rivet like the factory. At least they're cheap - I have 4 in the toolbox just waiting to be used.
 

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Registered
1990 300SEL, 2005 SL500
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17 Posts
Discussion Starter #14
After some R&D and little help from the machine shop I like to think that I got a very practical solution. I need to give credit where is due, by no means this was my idea. I just put several solutions to the mix and took the best out of each. This is what I came up with;

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I documented the process and I’ll post it here soon.
 

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1990 300SEL, 2005 SL500
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17 Posts
Discussion Starter #15
Here is the link;
 

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1990 300SEL, 2005 SL500
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17 Posts
Discussion Starter #16
Believe it or not but this little thing prevented me from getting the plates.
As it turns out rear windows must be fully operational. I don’t quite get that as on some cars there are just little side vents. Anyway this is already in the past, lets look forward.

Im about to order the plugs and cables but it looks like they are in short supply.
While searching, I mostly find plugs with an R in the part.
Kent from M.S claims to have a plug that work but does not disclose the model #.
Is it worth my while to look for none resistor plugs and original cables?
I thought, maybe going with the newer setup would be easier. Like resistor plug with none resistor wire set. Anyone know what is the resistance value of the factory setup (plug+wire) when new?
 

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Moderator
1991 500SEC sub 50K mi. 1987 560SEC Now 150K mi. 2018
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4,286 Posts
The metal cable connectors are 1K Ohms each.

The wires themselves are 'solid core' / metal with threaded brass connectors crimped on.
They are quite well thought out I've always thought.

MBL
 
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