Sl 350 Rear Sam Unit

David Grennan

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Hi,

This form was great with the last issue I had as regards a locking pump, so hoping someone can help with another issue I’m having with my Merc Sl 350.

Main question is on the rear Sam unit , have been told it’s water damaged , nothing in the car is working, started with diff faults now all gone and engine won’t switch off Sometimes...
looking for a part , found this one 13-16 Sl Class R231 Rear Right Sam Control Unit MODULE A2319064600
will this work on an Sl 350 2005 ?
seller says I need a part number ?

Does anyone have a part number for this or any advice ?

Also still getting water leakage into the boot of the SL ...any thoughts on this ?

Thanks in advance,
Dave.
 

AMGeed

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The latest Part# for the rear SAM is A 23 054 554 32
There are two previous Part #'s that will fit
A 23 054 530 32 replaced by
A 23 054 540 32

The Part number you quoted for an R231 will not fit.

EPC for confirmation of Part Numbers.
https://webautocats.com/epc/mercedes/1/fg/230456/65p/54/087/ For R230.456 check Vin# for exact model.
https://webautocats.com/epc/mercedes/1/fg/230467/65p/54/087/ For R230 467

Sorry to read about your SL leaking. Honestly, there are so many leaking just lately I think its appalling this model has such a poor design and build quality.
There is a fix for this that should be found in the search function.
 
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David Grennan

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Hi,

That‘s great, thanks so much for your repLy, very helpful.

unfortunately nothing is coming up on ebay for any of those part numbers.
Do you or anyone on this form have any thoughts on where I could pick up a spare / 2nd hand unit?
I’m guessing a new one is expensive ?

I‘ll check on the form for that leaking issue.
Think I saw something before when I had to replace the central locking pump ...again..

Have to agree...the leaking issue has broken my heart and cost so much already, love the car but this is probably the end...

Why has it got such bad build quality ...

Thank,
Dave
 

AMGeed

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Try Dronsfields Dave.
They are a well known Mercedes breakers,
Ensure that one of those Part#'s match before buying.


Looks like the US owners are being charged $461 at their main dealers.
 

AMGeed

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There are some on eBay US that are cheaper than a new one. Postage quite high and I don't know if there would be import duty on used parts.
Its an old Part # but corresponds to the ones that fit.
 
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David Grennan

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Hi,

That‘s great, thanks again for all your help this evening.
Will look at all the above.

Best,
Dave
 
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David Grennan

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Hi,

thanks again for all the help on this thread yesterday.
I have ordered the part from one of the links, they confirmed with vin number , fingers crossed .

One more question for yourself or anyone with any ideas.

Then mechanic who normally looks after the car said, he won’t put the part in unless the car is dried out and leak fixed .
Asked him why, but that’s it .
I have a de humidifier drying the car now, rented one.
Any other ideas ?

The Car is not safe enough to drive as cuts out so can’t get the leak fixed till after Sam replaced , or at least that’s the plan , can’t afford this for another few months either. So will out in underground car park.

Is there a tread on how much this could cost?

Thanks again,
dave.
 

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Hi,

thanks again for all the help on this thread yesterday.
I have ordered the part from one of the links, they confirmed with vin number , fingers crossed .

One more question for yourself or anyone with any ideas.

Then mechanic who normally looks after the car said, he won’t put the part in unless the car is dried out and leak fixed .
Asked him why, but that’s it .
I have a de humidifier drying the car now, rented one.
Any other ideas ?

The Car is not safe enough to drive as cuts out so can’t get the leak fixed till after Sam replaced , or at least that’s the plan , can’t afford this for another few months either. So will out in underground car park.

Is there a tread on how much this could cost?

Thanks again,
dave.
He won’t fit it if it’s still leaking as it will just fail again... he’s saving you money

There’s a guide in our DIY section on fixing the leaks
 

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How was this diagnosed? Rear sam’s sit off the floor and I have never seen one wet. Have you checked the can lines under passenger carpet?
 
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David Grennan

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Hi ,
Thanks for both replies.
looking at the DIY section and see the treads on the leaks at the base of the rear window And how they are a big problem on the SL . Looks like the problem .

As regards the rear SAM , the mechanic who looked at the car said this was the problem and SAM was covered in water ... I looked at a video on line and just as you said it sits off the floor so am confused how this is soaked ? tho maybe as intermittent water getting in now for awhile it’s corroded with dampness ?
the locking pump holder was also wet , I dried this out and still working ..so far.

If not the Sam any ideas what could be ? no where else in the booth is wet really exceot that area near pump, but can see a few water marks around.

The car is now giving intermittent electrical problems, sometimes completly dead ...and engine won’t switch off.

rest of the time , different functions won’t work and display often says, convenience functions not available ...

thanks again for any help,

I’m looking into someone looking at the leaks.
tho does look like the problem discussed on the DIY with SL, as have seen some water drips inside and on outlets on the boot door.

Have ordered the SAM unit .
 

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Rear sam is inside the car behind drivers seat, are you sure your guy has told you the right part?
 

AMGeed

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^ As Star above and the diagram linked, the rear SAM is inside the car, not in the boot.


These are the control modules in the boot area.
 
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David Grennan

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Sorry that’s my bad , got mixed up there with links and YouTube videos , I’m looking at a few .

Mechanic told me it’s a rear Sam, he’s a good guy looking after car last few years , but wonot work on this problem , demos it to someone else, they looked at dried out , it workEd for a few mins but now the problems as above.

Just found this link pretty much sums up the problem.
 

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That's an ML and the rear sam IS in the boot, but the sam in the SL is in the cabin? fuse-box-rear-seat.jpg
 
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David Grennan

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Ok thanks, does seem like the same problem tho ?
do you know / have a link to a video on replacement and where ?
I have a dehumidifier and want to make sure in right place in the car .

thanks again
dave
 

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Dave I think you need to visit a merc specialist close to you who knows about these cars, guessing costs. I personally don't think its the rear sam from my little knowledge ;)
 
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David Grennan

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Hi, thanks for all responses .

this kinda sums it up , have very similar problems , including sbc warning etc

 
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David Grennan

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Dave I think you need to visit a merc specialist close to you who knows about these cars, guessing costs. I personally don't think its the rear sam from my little knowledge ;)
Hi,

thanks for all that info .I have had a lot of hassle and problems still with this.
just wanted to say to you, can see totally what you mean about the Sam unit and how unlikely it is for water damage let alone emeried in water....
have looked at this as have new part , and it’s completely dry and no sign of any water damage , fuses all look absolutely no corrosion....that I can see.
so thank you for that and the fact you are right highly unlikely the problem.

can I ask you , do you or anyone know, can the rear battery in the booth if dead cause a complete instrument failure ?

thanks ,
dave.
 

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