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Registered
1999 SL500 (5.5 AMG)
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195 Posts
Discussion Starter #1
Hi everyone,
Just wondering as I have come across a good offer for an M119 6.0 AMG engine with transmission, diffs and ECU.

Would it be possible to swap out my M113 with that engine?
What about the transmission? Diffs?
What other ECU modules are required?

Lots of questions...
 

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1992 500SL, 1993 300SE, 1997 S320L, 2000 C230K, 2003 E500, 2005 Smart ForFour, 2008 Smart ForTwo
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312 Posts
Anything is possible, but it comes at a cost. Wouldn’t it be cheaper to buy a SL600 ?


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1995 and 1996 SL320 One Keeper One For Sale
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164 Posts
You should check on driveshaft differences. Also check part numbers for struts between the two cars to see if you need to change those over. Depending on lengths/positions etc, the tranny linkages might be different too. Are they both R129s and of the same year? If not you should consider switching all underhood wiring harnesses/starter/alternator too. Motor mounts and locations?
 

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Premium Member
1986 560SL with M120 V12 Engine, 1988 560SL Stock
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9,729 Posts
What year M119.

You will also need a wiring harness or two or three. What transmission do you plan to use.
 

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1995 and 1996 SL320 One Keeper One For Sale
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164 Posts
Also, just read this on the most current Facebook post for the Benz buy and sell group:

Someone help?

I have a 1985 380se that was swapped with the 5.0 v8 from the previous 3.8 liter. It runs fine. But the radiator fan doesn’t spin and at idle she overheats and the coolant just spilled out all at once. I don’t even know where to begin but could someone give me some pointers?

Answer that was posted:
You have to get a dual electric fan set up

Something else to consider.
 

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Premium Member
SL's & 500E's
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1,917 Posts
Crazy if you do it

Hi everyone,
Just wondering as I have come across a good offer for an M119 6.0 AMG engine with transmission, diffs and ECU.

Would it be possible to swap out my M113 with that engine?
What about the transmission? Diffs?
What other ECU modules are required?

Lots of questions...
Why re-invent the wheel, someone at the factory already did it.

Sell your 500 and buy a 600, and you will be driving all the time.

Start the swap project and you'll be off line for a long time, get frustrated, and wondering why you just didnt buy a 600 to begin with.

M113 motors are basically bulletproof and cheap to maintain, not so much with the V12's.

Other than the wow factor, the 600 wont be that much more quicker, (if at all), or handle as well.

Good Luck, what ever you decide to do
 

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Registered
94 SL320 98 SL500 99 SL600
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871 Posts
Why re-invent the wheel, someone at the factory already did it.

Sell your 500 and buy a 600, and you will be driving all the time.

Start the swap project and you'll be off line for a long time, get frustrated, and wondering why you just didnt buy a 600 to begin with.

M113 motors are basically bulletproof and cheap to maintain, not so much with the V12's.

Other than the wow factor, the 600 wont be that much more quicker, (if at all), or handle as well.

Good Luck, what ever you decide to do
Geez I gotta chime in on this> I have a 3 R129's and no way can the SL320 OR SL500 come close to the SL600 V12, for speed I've read where others have said they aint no quicker but I doubt they ever drove a V12.:devil
 

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Premium Member
SL's & 500E's
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1,917 Posts
ROI

Geez I gotta chime in on this> I have a 3 R129's and no way can the SL320 OR SL500 come close to the SL600 V12, for speed I've read where others have said they aint no quicker but I doubt they ever drove a V12.:devil
Return on investment - I admit that if the right 600 comes along, I'd buy it over the 500. For me it's just is the additional investment worth it after I already have a 500.

The two 129's I would like to get are a SA or a 600, or even better yet a SA600, and I won't argue the speed thing with you at all, as I haven't driven a SL600, just read reviews.

If the right 600 came along at the right price, I might sell my 2000 SL500 to get it. But no way I would even consider an engine swap to achieve the same goal. Anything is possible, just how motivated are you.

I just noticed that Roncallo responded to this thread, his 600 swap into a 107 is very special, and I see someone is just starting a 600 swap into a SLC.

If the OP decides to go ahead with the 129/600 swap, I'll certainly be looking forward to reading about the progress.
 

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Outstanding Contributor
1997 SL600 Brilliant Silver Sport with grey/dark metal interior, 234K miles
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1,977 Posts
I think the OP is talking about a 6L V8 AMG M119 engine to replace his 5L V8 M113 and not the 6L regular V12 M120.

Swapping a V12 into a SL500 would be difficult as there are so many specific parts (it's really a different car). But swapping a M119 for a M113 would be a bit easier.
 

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Registered
2002 SL500 Silver Arrow
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602 Posts
Geez I gotta chime in on this> I have a 3 R129's and no way can the SL320 OR SL500 come close to the SL600 V12, for speed I've read where others have said they aint no quicker but I doubt they ever drove a V12.:devil
So this. I had read this type of comment before I bought my SA. During my search I test drove an SL600 (1999 base, IIRC) and it was WAY different than the 500s I had driven up until then. I don't care what the published numbers say, butt dyno says two completely different animals. Knowing I had teenagers coming into driving age and that I would let them drive my car on occasion, I decided against a V12 because I thought it'd be insane to let them out in one. That was a few years ago. I'm ready for a V12 now.
 

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Registered
94 SL320 98 SL500 99 SL600
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871 Posts
I think the OP is talking about a 6L V8 AMG M119 engine to replace his 5L V8 M113 and not the 6L regular V12 M120.

Swapping a V12 into a SL500 would be difficult as there are so many specific parts (it's really a different car). But swapping a M119 for a M113 would be a bit easier.
What would entail putting the 6L V8 in my 98 SL500? Is it a possibility without rewiring the car, kinda plug and play? I drove a E63 last weekend and that sucker runs:grin
 

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Premium Member
SL's & 500E's
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1,917 Posts
My Bad

I think the OP is talking about a 6L V8 AMG M119 engine to replace his 5L V8 M113 and not the 6L regular V12 M120.

Swapping a V12 into a SL500 would be difficult as there are so many specific parts (it's really a different car). But swapping a M119 for a M113 would be a bit easier.
All I saw was 6.0 and just assumed... a 119 6.0 is another animal

I'd guess the best SL to swap it into was a year SL that closely matches the engine.

I wonder, on another forum a member was looking at a AMG 6.0 out of a W140 S class, and was for sale in the same neck of the woods. I think he decided against it because of the lack of repair parts needed after a lot of research. I think that one needed a new crank, unubtanium..

Sounds rather tempting though....
 

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1999 SL500 (5.5 AMG)
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195 Posts
Discussion Starter #13
I think the OP is talking about a 6L V8 AMG M119 engine to replace his 5L V8 M113 and not the 6L regular V12 M120.

Swapping a V12 into a SL500 would be difficult as there are so many specific parts (it's really a different car). But swapping a M119 for a M113 would be a bit easier.
Thank you sir,
 

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1999 SL500 (5.5 AMG)
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195 Posts
Discussion Starter #14
What year M119.

You will also need a wiring harness or two or three. What transmission do you plan to use.
Engine is from a 1997 E60 AMG (W210)

Comes with the 5 speed gearbox, diffs, instrument cluster and ECU and harnesses.

Just got word that the engine was booked by a russian dude.
 

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Premium Member
1986 560SL with M120 V12 Engine, 1988 560SL Stock
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9,729 Posts
Engine is from a 1997 E60 AMG (W210)

Comes with the 5 speed gearbox, diffs, instrument cluster and ECU and harnesses.

Just got word that the engine was booked by a russian dude.
This would be a very difficult task. The electronics of the entire M119/722.6 transmission would need to be installed with harnesses. Would probably be a lot easier if it were a early 90's with 4 speed transmission.

A more practical route would be to sell the SL500 and purchase an SL600 with the M120 V12. While some consider the M120 to be impractical, I believe it would be far more practical that an SL500 with a swapped 6L M119 that was not integrated from the factory.

As far as the reliability of the M120 I have had no issues in 10 years. Granted I have only put about 20K miles on a 40K engine but 10 years is 10 years.

Also if you are of the caliber person to be capable of performing the 6L swap, then maintaining an M120 should be a piece of cake.

As far as performance of the M120 vs M113 some say the are the same from 0 to 60 and that may be true as the SL 600 is carrying ~ 300 extra Lb. But after 60 MPH its game over.
 

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'82 500sec euro, '95 Ford F150
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M120, first or preferably second gen is the way to go for anyone having the itch to experience V12 ownership. They are the most reliable V12s, by a mile, more so than some other lesser cylinder count engines.
I personally loathe the older, four speed automatic trans, prefer the next generation five speed that came out 96.
As for the OP’s question, it would be possible, but then again, why?? Sometimes in life you should consider, “just because you can, you probably shouldn’t “
The car you have, only is the same in terms of body, EVERYTHING else is different in terms of engine, harnesses, engine management, etc. compared to the one with an M119.
If you do feel like you want to build an SL with a 6.0,M119, get the engine first. The generation of that will determine what year car you can drop that into. ‘90-‘92, ‘93-‘95, or ‘96-‘98.
 

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1999 SL500 (5.5 AMG)
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195 Posts
Discussion Starter #17
Just wanted to install an AMG block in the car.

Question, are there any differences in the M113 5.5 liter engines that went into these cars back in 1999 and 2000?
I mean, is it just the engine plenum that's different.

R129 SL55 engine is the same as the one that went into the W208 CLK55 and W210 E55 ones?

Here's the engine from the SL55 AMG



And here's the engine from a CLK55 AMG

 

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MB CL500(C215);SL55(R129), SL63(R230)
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469 Posts
Just wanted to install an AMG block in the car.

Question, are there any differences in the M113 5.5 liter engines that went into these cars back in 1999 and 2000?
I mean, is it just the engine plenum that's different.

R129 SL55 engine is the same as the one that went into the W208 CLK55 and W210 E55 ones?
Hi Ahmed.
Dependant of the chassis, the engines are different in details.
I have put some information to that into the german wiki:
https://de.wikipedia.org/wiki/Mercedes-Benz_M_113
Since MB has not documented the 113.985 in EPC, the differences in detail can only be guessed.

Cheers, Frank

(PS: The SL 55 has also a different transmission program and rear diff.)
 

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1999 SL500
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194 Posts
It's going to fit and all. You'll have no issues putting it in. The difference is the size of the cylinders and the supercharger, that's all besides the obvious..

Just wanted to install an AMG block in the car.

Question, are there any differences in the M113 5.5 liter engines that went into these cars back in 1999 and 2000?
I mean, is it just the engine plenum that's different.

R129 SL55 engine is the same as the one that went into the W208 CLK55 and W210 E55 ones?

Here's the engine from the SL55 AMG



And here's the engine from a CLK55 AMG

 

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One of the BW Old Guard/R129, W204 Moderator
1997 SL500- 40th Anniversary
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7,148 Posts
I say, if you have the means and talent to pull this off, go for it!

You can figure out the details as you go, as long as there is no artificial deadline, and your commitment is 100%.

It aint gonna be easy, and there will be failures (learning moments) along the way.

I believe member Roncallo has commented on this thread. If I am not remembering correctly, he shoe-horned a M120 into a R107, and included the transmission, redesigned suspension, diff carrier, speed sensor mounts, the entire works!

If you are not familiar with his project, navigate to the 107 forum and google "Samson", or contact Roncallo directly.

Good Luck!
 
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