1999 S600: What to watch out for? - Page 2 - Mercedes-Benz Forum
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post #11 of 28 (permalink) Old 04-23-2015, 09:43 AM
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Originally Posted by Rallyus View Post
I'm sorry but your wrong!


And I have a 98 car (your 99)

Evaporator is still an issue and wiring harness is still an issue, not because of biodegradable materials but because of It's age.

My car is a diesel, and I had already to change some parts of the harness.


The evaporator issue was never resolved during the W140 production. Later cars just don't suffer so much because they are younger.
I'm not sure about that; I believe evap was much improved by 98 - 99
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post #12 of 28 (permalink) Old 04-23-2015, 10:14 AM
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Originally Posted by Rch.Org View Post
I'm not sure about that; I believe evap was much improved by 98 - 99
Both an independent (3rd generation) and my dealer have told me the production evaporators were redesigned in 1996 and no longer contained the dissimilar metals like earlier evaporators did.

Also, the biodegradable wiring harnesses were addressed in a running production change in between model years 95-96 that is well documented. There is no reason why a wiring harness in a later model car would fail any more than one in a car from the 1980's, for example.

Dan
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Last edited by LWB250; 04-23-2015 at 10:16 AM.
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post #13 of 28 (permalink) Old 04-23-2015, 11:17 AM
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Originally Posted by LWB250 View Post
Both an independent (3rd generation) and my dealer have told me the production evaporators were redesigned in 1996 and no longer contained the dissimilar metals like earlier evaporators did.

Also, the biodegradable wiring harnesses were addressed in a running production change in between model years 95-96 that is well documented. There is no reason why a wiring harness in a later model car would fail any more than one in a car from the 1980's, for example.

Dan
Hah... I had a 87' W124 300D Turbo...


Don't even get me started on the wiring harness on those.

All W140 wiring harnesses unless replaced at a later date will start to fail due to sheer age.

Biodegradables just went first.

About the evaporator, what that dealer and the indy fail to explain then is how 97 and 98 cars have incidents with the evaporators. Mine was one of them. The PO supplied the invoice with a nice 5 figure sum for the repair.


Glad he did it and it wasn't me...
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post #14 of 28 (permalink) Old 04-23-2015, 06:35 PM
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Changing from the copper/aluminium design to all aluminium extends the life of the evaporators but doesn't eliminate corrosion. They can and still do fail, I've had two aluminium ones in other cars perforate.
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post #15 of 28 (permalink) Old 04-23-2015, 06:51 PM
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Originally Posted by NYC140 View Post
I previously owned a low-mile 1999 s420 for many years and absolutely loved the car. I sold it in 2010, unfortunately, but am back in the market for another 98-99 W140.

I've found an S600 that I'm really interested in, but wanted to ask the opinion of other s600 owners about reliability & repairs on the v12 before I make a move on it.

Its a 1999 S600 w/85k miles (2 owners). The car is in great shape aesthetically (for its age) but I'm afraid it might be a ticking time-bomb in the repairs dept. The current owner has had it for 8 years (since 48k miles) but does not have specific service records on the car...this is the part that worries me the most. Although he's performed regular oil changes, replaced the starter, water pump and done some work on the suspension (he said it was problematic in the past but had it addressed using s500 suspension parts), he apparently hasn't taken it to a dealer for regular service intervals. I'm a little wary of this, but love the car...

What should I look at specifically when I go to inspect the car?

I will definitely take it in for a PPI, but it would be helpful to have a checklist of items to review/inspect when I first see it.

Thanks in advance,
R
NYC140:

I don't mean to scare you but you must wait until you can find a car with verifiable maintenance owned by someone with the financial means to keep the car impeccably maintained. . My 95 s600 came with $65K (!) worth of repair receipts all performed within the previous 5 years. The PO had the car from 85K miles to 134K miles. That did NOT include a rebuild on the transmission (reverse was going out) which I had factored into the price. The cosmetics on the car were 9.5 out of 10. In addition you will need a scanner to read fault codes (There will always be fault codes:-(

The showstopper on a M120 engine is oil leaks. I don't think anyone has the money to fix all of them and drive the car regularly. Small oil leaks can cause trouble.


My motto for the potential S600 or CL600 owner is "You can pay up front or you can pay in the end, but you will pay"

Good luck.

Ken

1995 S320 -- built like a tank.


Unfortunately, tanks break down a lot.

Last edited by Ken_phd; 04-23-2015 at 10:42 PM.
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post #16 of 28 (permalink) Old 04-23-2015, 07:11 PM
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Originally Posted by NYC140 View Post
Thanks Dan.
That's some very helpful perspective.
I have a great MB mechanic on Long Island that I will seek out for the PPI, provided the owner let's me do so.

Much appreciated,
R
hmmm.....where in long island? I need to find one too for my S600
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post #17 of 28 (permalink) Old 04-23-2015, 07:43 PM
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Most definitely get a pre-purchase inspection! If you can't afford the inspection, you can't afford the car.
There is no such thing as a cheap W140. What is the selling price? Does it have the 4 place seating? That makes it worth considerable more.
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1999 S600 - 4 place
1999 S500 Grand Edition-Sold to good home!
1999 S500 - Deceased
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post #18 of 28 (permalink) Old 04-23-2015, 08:55 PM Thread Starter
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hmmm.....where in long island? I need to find one too for my S600
Westbury...the BEST mercedes mechanic on LI. Give them a call!
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post #19 of 28 (permalink) Old 04-23-2015, 09:31 PM
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Originally Posted by Ken_phd View Post
NYC140:

I don't mean to scare you but you must wait until you can find a car with verifiable maintenance owned by someone with the financial means to keep the car impeccably maintained. . My 95 s600 came with $65K (!) worth of repair receipts all performed within the previous 5 years. The PO had the car from 85K miles to 134K miles. That did NOT include a rebuild on the transmission (reverse was going out) which I had factored into the price. The cosmetics on the car were 9.5 out of 10. In addition you will need a scanner to read fault codes (There will always be fault codes:-(

The showstopper on a M120 engine is oil leaks. I don't think anyone has the money to fix all of them and drive the car regularly.


My motto for the potential S600 or CL600 owner is "You can pay up front or you can pay in the end, but you will pay"

Good luck.

Ken
The M120 has the common oil leaks of the M119 plus the common oil leaks of the M104 without the poorly designed M104 rear main seal (it's the same part no. as the M119 rear main seal.) The extra work comes from having to remove the manifold to fix most of the oil leaks, I personally wouldn't call it a showstopper if you can DIY and have another car. Paying someone could cost a lot depending on who does the work.
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Previous: MY97 CL600, MY92 600SEL, MY98 S420, MY96 S280 x2

Last edited by Joe-V12; 04-23-2015 at 11:13 PM.
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post #20 of 28 (permalink) Old 04-23-2015, 10:44 PM
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Originally Posted by Joe-Trojan View Post
You're talking about the wrong engine. Please delete or edit this post as it's full of misinformation.

M120 W140 has a air to oil cooler in the front bar. You're talking about the M137 with its water to oil cooler in the valley.
Joe:

Sorry. I have edited my post.

Cheers,

Ken

1995 S320 -- built like a tank.


Unfortunately, tanks break down a lot.
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