[Petri68]

I found a very cheap SLK320 2001 with a lot of options I never heard of before.
The issue and reason that it was so cheap is that the ECU is defective.
A couple of components on the circuit board has burnt up.

Everything else works and she looks great.
How do I solve this?

And I´m also confused about the partnumber.
EPC tells me that it should be A112 153 1079 but SDS gives me the number A027 5459 9332

@Dave2302 I know that you have worked a lot with these ME 2.8.. do you have any ideas?

Brgds Petri

Stay safe and take care

 

[Dave2302]

Buy good used ECU, exact or revision p/n (use EPC) from a decent breaker.

Virginise ECU, (you need someone with the skills and equipment to do that.

Do initial Start Up on SDS.

Or ......................

Buy Key(s), DAS / RF Module and Motor ECU all parts must be matched set, i.e. from the very same Car and it must have been starting and running fine before being broken up

You can swap Key Blades to avoid changing locks, but must keep the immo chip and pcb that came with the matched sets Key(s).

Or ......................

Buy new ECU from MB and have them "Initial Start" it, but just doing ECU swap doesn't mean there wasn't a fault with Keys or DAS / RF in the first place and some KJ has prodded around the wiring and subsequently blew up the ECU. ECU's don't usually fry themselves

HTH

 

[Petri68]

Buy good used ECU, exact or revision p/n (use EPC) from a decent breaker.

Virginise ECU, (you need someone with the skills and equipment to do that.

Do initial Start Up on SDS.

Or ......................

Buy Key(s), DAS / RF Module and Motor ECU all parts must be matched set, i.e. from the very same Car and it must have been starting and running fine before being broken up

You can swap Key Blades to avoid changing locks, but must keep the immo chip and pcb that came with the matched sets Key(s).

Or ......................

Buy new ECU from MB and have them "Initial Start" it, but just doing ECU swap doesn't mean there wasn't a fault with Keys or DAS / RF in the first place and some KJ has prodded around the wiring and subsequently blew up the ECU. ECU's don't usually fry themselves

HTH

Thanks Dave.
I took it out of the car and opened it up..
I can´t find any burnt components.. The circuit board looks clean and nice.
SDS gave me this.. Can that cause that it don´t start?
Everything in the car works but nothing happends when I turn the key for start.

 

[Squishband]

Blimby Dave, that was pretty comprehensive 👍🏻

 

[Petri68]

I took the ecu from the siren and put in to the new car and it cranked once but did not start.
I put it back in the Siren and it works, so the problem have something to do with the esu.
The Siren is my other SLK 320 2001.
What is my next step?

 

[Dave2302]

so the problem have something to do with the esu.

Not necessarily !!

You have SDS .............. Use it Don't just rely on Fault Codes, USE IT !!

Use SDS to check Drive Authorisation in ME2.8, and DAS / RF Module !!

Sounds like you need a new Throttle Pedal assy too but usually they don't cause it not to crank and start

I think it most likely that DAS / RF is buggered.

Have you plugged the original ECU back in and if so did it crank once but not start ?

The immobiliser (Drive Auth) does this power off then 1 crank anomaly, so it is handy for those that know that to do a quick & dirty test

 

[Petri68]

Not necessarily !!

You have SDS .............. Use it Don't just rely on Fault Codes, USE IT !!

Use SDS to check Drive Authorisation in ME2.8, and DAS / RF Module !!

Sounds like you need a new Throttle Pedal assy too but usually they don't cause it not to crank and start

I think it most likely that DAS / RF is buggered.

Have you plugged the original ECU back in and if so did it crank once but not start ?

The immobiliser (Drive Auth) does this power off then 1 crank anomaly, so it is handy for those that know that to do a quick & dirty test

The original ECU is back in the car and nothing happends, No crank and the same error codes in SDS.

I will plug it up again and check Drive Authorisation.
Thanks

 

[Dave2302]

I'm wondering here if you haven't got the full story with this Car ...............

I suspect someone has bought an ECU off EBay and it is from a different V6 M112 Car, because as I found out R170 V6 ECU's are unique to R170, therefore they don't crank even if the Drive Auth is correct, because R170 does not use CAN Cranking (EIS), instead it uses a regular Ignition Switch with hard wiring and a Relay in the Pulse Module.

By swapping your good ECU in, and the fact it cranked then immobilised, you have proved that your Ignition Switch and your Pulse Module is good, so yes it now looks like ECU has issue or is the wrong one.

SDS gives me the number A027 5459 9332

SDS is reporting a very early V6 ECU part number (I think you entered an extra 9 above), I have 2 early V6 ECU part numbers, which are ....

A 027 545 93 32
and
A 030 545 60 32

but I'm not certain either of those two /\ were R170 ECU's, they could be from CLK or C320 V6 !!

The three I know definitely work with V6 R170 are ....

A112 153 01 79

A112 153 10 79

A112 153 32 79

HTH

 

[M4rCu5]

^^That^^ makes sense maestro - my 2001 320 is A112 153 10 79

 

[M4rCu5]

BUT .. throw A0275459332 into an eBay search and we've got 2 results for R170 V6

Very early, could it possibly be ME2.0 that a PO has bought in good faith and has then been disappointed?

As opposed to:

🤷‍♂️

 

[Petri68]

Hi.
I will continue today and I will check what ecu the siren have, I didn´t think of checking that yesterday.
But EPC mention A112 153 10 79 when I search with the new cars vin-number.

I will get back

Thanks all

Brgds Petri

 

[Petri68]

Hi.
You are probably right with the idea about the history of the car.
The first one is Sleepy and the other one is The Siren.
And EPC mention that Sleepy should have A112 153 10 79.

So I will start hunting for a used ECU with the correct number.

Thanks a lot.

Brgds Petri

 

[M4rCu5]

Hi.
You are probably right with the idea about the history of the car.
The first one is Sleepy and the other one is The Siren.
And EPC mention that Sleepy should have A112 153 10 79.

So I will start hunting for a used ECU with the correct number.

Seems to be the way forward, following @Dave2302 advice in post #2

 

[Petri68]

I can introduce "Sleepy", My new project for the winter so that "the Siren" get a sister 2023
Previus owner bought it 2005 but it has been parked for 2 years now.
An indie had it for 1 year before the previus owner decided to sell the car instead, so I bought and picked it up 2 days ago.
The only problem SDS can find is the ECU, otherwise everything works, Roof, radio with navigation etc
The plan is to get her running, and then new oil,All filters, new brakes and some other minor issues.
The market value in Sweden at this time of the year is about SEK 75000 and I bought the car for SEK 22000.

A used ECU with warranty is now ordered from Germany with the correct partnumber.

 

[Dave2302]

OK, I don't think I was that clear about used ECU's .................

When I started the V8 Project, I bought about 10 "SLK V6" ECU's from Flea of the Bay, Amazon and a few breakers yards, all of them were advertised as suitable for R170 SLK 320 V6 ...............

Of that circa 10 only about half of them were, the others would not work the Cruise LIM nor would they allow the Car to crank over !!

More work revealed that once I separated the bottom Casing Plate from being bonded to the PCB and viewed the "underside" of the PCB there was a load of extra SMD Components on the R170 (regular Ignition Switch) ECU's, these components were not present on many of the other ECU's I had bought which were supposedly suitable for R170 320 V6 !!

Clearly these ECU's were not suitable for R170 V6 as these would not allow the Car to Crank Over nor did the Cruise / LIM work !!

So, next up, I got all clever and took the extra SMD's from one of the correct ECU's and fitted them to the V8 ECU, still no Crank, still no Cruise LIM.

I concluded that there was not only hardware differences but also software files differences in one of the chips, but I couldn't find that difference in the 3 files I could access with my equipment

I gave up and added extra Coil and Injector drivers so I effectively converted a V6 R170 ECU to run the M113 V8. That also meant changing the mapping s/w to V8 etc etc.

The specifics are something I'm not gonna divulge publicly, they have no bearing to Petri's issue.
I had help from a few guys who actually earn from doing these conversions, and so if anyone reading here wants to be a clever dick and pm me to find out how it's done, you will get ignored !!

So, my point is to get the correct R170 V6 ECU do not believe what a seller tells you, buy based on part number only, and the 3 p/n's I have given definitely work.

There may be others that are suitable, but they are the ones I KNOW will work and 3 years ago when I was spending a bunch on ECU R&D fodder they were the popular ones that I could get hold of fairly easily

Also, don't forget @Petri68 you will need to get that ECU Virginised by someone with the correct kit, and do "Initial Start Up" using SDS ..... Screw up the Initial Start and it needs Virginising again

ATM until you know what the Drive Auth is / isn't doing you will be playing "Parts Darts" because you do not know for sure what the fault is right now !!

So my next reply will be when you have actually done what I asked and posted screen shots of the Drive Auth Data in ME and in DAS / RF Modules, we need to see the Key Data, and Drive Auth Data.

BTW, somewhere on this forum, I posted screenshots of exactly where and how to find Drive Auth and Key data, the DAS / RF isn't labelled as DAS / RF it is IIRC IFZ or similar, and finding Key info was also hard to find but it is their in one of the HHT menus of IFZ.

I am very busy right now, so you will have to use your own time and the Forum search function in order to help yourself

 

[Petri68]

OK, I don't think I was that clear about used ECU's .................

When I started the V8 Project, I bought about 10 "SLK V6" ECU's from Flea of the Bay, Amazon and a few breakers yards, all of them were advertised as suitable for R170 SLK 320 V6 ...............

Of that circa 10 only about half of them were, the others would not work the Cruise LIM nor would they allow the Car to crank over !!

More work revealed that once I separated the bottom Casing Plate from being bonded to the PCB and viewed the "underside" of the PCB there was a load of extra SMD Components on the R170 (regular Ignition Switch) ECU's, these components were not present on many of the other ECU's I had bought which were supposedly suitable for R170 320 V6 !!

Clearly these ECU's were not suitable for R170 V6 as these would not allow the Car to Crank Over nor did the Cruise / LIM work !!

So, next up, I got all clever and took the extra SMD's from one of the correct ECU's and fitted them to the V8 ECU, still no Crank, still no Cruise LIM.

I concluded that there was not only hardware differences but also software files differences in one of the chips, but I couldn't find that difference in the 3 files I could access with my equipment

I gave up and added extra Coil and Injector drivers so I effectively converted a V6 R170 ECU to run the M113 V8. That also meant changing the mapping s/w to V8 etc etc.

The specifics are something I'm not gonna divulge publicly, they have no bearing to Petri's issue.
I had help from a few guys who actually earn from doing these conversions, and so if anyone reading here wants to be a clever dick and pm me to find out how it's done, you will get ignored !!

So, my point is to get the correct R170 V6 ECU do not believe what a seller tells you, buy based on part number only, and the 3 p/n's I have given definitely work.

There may be others that are suitable, but they are the ones I KNOW will work and 3 years ago when I was spending a bunch on ECU R&D fodder they were the popular ones that I could get hold of fairly easily

Also, don't forget @Petri68 you will need to get that ECU Virginised by someone with the correct kit, and do "Initial Start Up" using SDS ..... Screw up the Initial Start and it needs Virginising again

ATM until you know what the Drive Auth is / isn't doing you will be playing "Parts Darts" because you do not know for sure what the fault is right now !!

So my next reply will be when you have actually done what I asked and posted screen shots of the Drive Auth Data in ME and in DAS / RF Modules, we need to see the Key Data, and Drive Auth Data.

BTW, somewhere on this forum, I posted screenshots of exactly where and how to find Drive Auth and Key data, the DAS / RF isn't labelled as DAS / RF it is IIRC IFZ or similar, and finding Key info was also hard to find but it is their in one of the HHT menus of IFZ.

I am very busy right now, so you will have to use your own time and the Forum search function in order to help yourself

Hi @Dave2302 and thanks for all of your advises.
I have ordered a ECU from germany with warranty , Partnr A112 153 1079
You mentioned 3 different partnr and EPC according to the VIN was one of then, So that is the one I ordered,
I will take care of some other small issues with the car while I wait for the new ecu.
And when I got it I will write new information about my progress
Thanks

 

[Dave2302]

I have ordered a ECU from germany with warranty , Partnr A112 153 1079

There seems to be a communication error here, it is not plug and play, it will not start !!

 

[Petri68]

There seems to be a communication error here, it is not plug and play, it will not start !!

No. But I will have the correct part and I will work from there when I get it

 

[M4rCu5]

Approx £5k cheaper than market value is a pretty good catch tbf ~ nice one but I'd have gone for post #2 option #2 myself, even though there aren't any sets currently on eBay, anywhere, WW plenty of sets for the L4's but not a one for the V6's 🤷‍♂️ it might have been worth phone-trawling the breakers, Dronsfields etc.

 

[Petri68]

Approx £5k cheaper than market value is a pretty good catch tbf ~ nice one but I'd have gone for post #2 option #2 myself, even though there aren't any sets currently on eBay, anywhere, WW plenty of sets for the L4's but not a one for the V6's 🤷‍♂️ it might have been worth phone-trawling the breakers, Dronsfields etc.

I´m working with the car, A used correct ECU is ordered and while I wait for that I`m working with brakes and interior.
I know that the ecu will give me some issues, but with help from all you guys I think that it will work out