Hey, thanks guys. Nothing makes a mechanic feel better than being told he did a job well done.

Mike, looking forward to hearing more about your progress. The best tip I could give is gather what you need, and once you start, don't stop till it's complete. If you have any questions, I am here to help.

I actually just got the V8 car back on the road. It was down for a few weeks with a bad accelerator pedal. It is now my daily driver again.

Jared

 

Jared, I finally started-v6 on its way out, clean up m113, Just a little info? You said original ecm for crossfire would start 113 but didn't run well -do you think install of drivers etc. for #7,8 in v6 ecu might be a beginning for basic running engine--Josh still available for some help with ecu? Finished my old tractor restore, thought you might be interested.

Just an old friend that needed refresh

113 ready for install

 

Nice looking Farmall.

I don't know everything that is done with the V6 ECU to get it to support the V8.... but I do know that the missing drivers and resistors need to be added, and it needs to have the correct V8 fuel map installed.

I don't believe (means I don't know), if just adding the drivers and resistors will make it run with the V6 mapping. The V6 Mapping won't even know to look for the additional drivers and injectors.

What engine did you go with??? I hope it's the 5.4.

Edit, just re-read your previous post and saw you are using the 5.0

Jared

 

went with the 5.0--only 19k miles--have some cams on the way, upgrade injectors and throttle body, headers, might get 350HP? Ill try Josh tonight--thanks

 

@413mk

Hi,

Add the 2 missing Coil Drivers and the SMD Resistors for them, also add the 2 missing Injector Drivers and their SMD resistors, that's the H/W done

Now it will run (badly) because it only will fire on the 2 timing cylinders, as your Flash File (Mapping) has 6 cylinder firing order etc ................. But at least you know you haven't bricked it soldering things
Measure the values of the Mosfets on the V6 ECU PCB, there are some different ones, harvest ones with the correct value (I bought a few old EBay ECU's to play with, MB say they should be matched), I didn't do that originally, which meant I had a slightly (very slightly) rumpy idle, changing the Mosfets for ones that matched the other 12 cured it, again after looking for Vac leaks etc etc etc so learn from my mistakes

Next you need to copy the Flash File from the V8 ECU, then write that to the Crossfire / Slk ECU.
Now use your SDS to set the Motor Version Coding to M113.

If you then keep getting random misfire codes and cylinder shutdowns it is an issue in the EEPROM File, @lotsofspareparts Jared can put you onto a guy on here who may well be able to help you with an EEPROM file to sort that out, he helped me

Basically don't waste hours and hours looking for a Misfire that isn't a real misfire like I did, it should now run and sound sweet, next job is road test it

If it wasn't for Jared and Andrew on this Forum I likely still would be chasing misfires

HTH,

 

Thanks much Dave with ecu info, talked to Josh TMBSS-the mercedes benz swap shop, he has a special on ecu-v8 programming and think I would be wise to let him do the conversion. Going to get a performance tune also! Every thing else is going like an ordinary engine change, working on exhaust manifolds (as per Jared) I need to thank him for all the details and pictures, tough to do without him! Friends think I'm nuts for using a perfect car but I think "could of had a V8" ....I did a transplant on a 1997 Dodge 1500, installed a 07 Hemi and trans out of a 2500 with my daughter doing most of it, truck has about 75k on the swap and is sweet, burn the tires for about a block and 23MPG on the highway. I hope the XF turns out the same.

Masters-Mechanical Engineering and "Doc"

 

Just to be clear before you spend money, you absolutely MUST use the V6 Crossfire ECU, SLK and Crossfire have unique (to any other MB) Starter Cranking and Cruise / LIM hardware and strategy in their ECU's so you cannot just clone a V8 ECU to Immo like you would if you were putting a V8 in a C Class etc, I been there done that got the Tee It just doesn't work

 

I purchased a cheap XF ECU from fleabay and had that one modified. The original V6 ECU is untouched, as is the 3.2 engine I decided to hang onto as a backup plan should something go south.

The manifolds turned out to be super simple, although I will admit that I think my drivers side manifold has sprung a leak. It ticks when it's cold and something swells up while I'm driving and it almost goes away.

Good luck Mike, although you shouldn't need it. It really was easier to swap the M113 into the XF than it was to swap the TPI 350 into my S-10 pickup. I read what others had done, and tried to consolidate that information in this thread.

Jared

 

Yes, well actually that's exactly what I did, I bought a good used SLK V6 ECU first and modded that one, then after I got it all running correct, I then converted my original ECU too, so now have 2 ECU's that will start and run the Car, so if ever the ECU goes Tango Uniform I have a spare one ready to go on the shelf

 

.


And for those who are unindoctrinated, Tango-Uniform is equivalent to teats-up (yes, it gets edited if you use the EXACT 4 letter word), suffice to say it goes south while trying to use it. Try the first (only the first) 6 listed definitions here ( https://search.yahoo.com/search?p=or...&ei=UTF-8&fp=1 ), for a good laugh and history lesson!...


.

 

well out with the 6 in with the 113 this weekend, nice clean swap, manifolds went well, ecu on its way back, this week will tell, again thanks to all!

112 out, 113 in, finish bolt ups and wiring, install 2X12" fans -1750 cfm,

 

Hope it doesn't bite you, but I installed my pusher cooling fan before I put the engine in. It allowed me to lean the radiator back far enough to slide it in.

Looks great though..... very familiar!!

Jared

 

I moved my Radiator Down and Forwards and used an uber thin Mercedes W203 Fan, which runs from the ECU PWM Signal just like the original factory system

My Radiator and it's Subframe now drops out from underneath in about 10 minutes flat if needs be.

It's all in my thread on SLK World if you want to go that way

HTH

 

installed Two (2) 10" pusher s blades, removed grill and unbolted ps cooler line, slipped in fans. Just a question - if I used a wiring harness of of 06 XF and just added #7, #8 coil wires and injector wires in the loom, installed in harness plug, might not need to use extra splices or jumpers--still using origional ecu/modified for 113? Just an idea.

 

I found it very simple to just use the V8 Engines Harness, you would very likely need to take the whole Intake Manifold off it to un plug the Knock Sensors, my Harness although it was longer, it clips round the Bulkhead in a nice loop, and all looks factory almost plug and play

IIRC there is only ~ 5 wires to connect up in the Fuse / ECU Box, I bought the correct terminals from MB to go on those, and used the original SLK style (X-Fire in your case) Plastic Plugs ..................

Alternator warning lamp
A/C Pump
Starter Exciter ....
\/ \/ \/



Coils +
Injectors +
\/ \/ \/



Have you remembered to fabricate the 6 - 8mm thick Spacers to drop the Anti-rollbar (Sway bar) chassis Brackets down a tad ???
Otherwise it does bash on the Sump under full suspension droop situations, like cresting a hump bridge fast

 

I never bothered doing this. 8k on the swap so far and haven't had any issues. When I have the car on the lift, the sway bar just barely touches the heads of the bolts on the sump.

I think I'd have to be driving like Luke Duke to get my bar to make contact while driving.

Jared

 

It's up to you if you want to add the missing wires to the V6 harness. I found it much easier to use the correct V8 harness and splice the 5 wires. The splices are hidden inside of the ECU box. The V6 harness would have to be unsheathed to run the new wires and it could wind up looking like hell.

I soldered and heat shrunk the connections and when I am showing the car to someone I like to pull the top of the box off and show them how easy it was to wire. Almost plug and play. You can see where the extra 14 inches of V8 harness is hidden.

Jared

 

the sway bar was almost touching on mine, installed 3/8" flat stock/drilled center holes, stock lock plates were bent down(tough metal!), looks factory and now have plenty of room at pan. My problem is stock 03 sl500 harness does not come close to fitting, Dave what harness did you use? Jared which one did you finally end up with--cl500, what year?

 

If I remember correctly, my harness was from an 03 CL500. The part number is A2205409232. $40 plus shipping on eBay.

Jared

 

Yes W220 harness is what I used, the CL harness that Jared used is a W220 Part number, likely the same harness as the 2 cars are very much the same platform

I got rid of the extra length like this :-



Remember though that my ECU Box is on the other side to you 2 guys

I can well believe that an SL Harness would be different

Despite using new Engine Mountings, I felt my Rollbar touching just driving it up my driveway at slow (20 mph ish) speed over a dip