(I am confused as well. He did say they asked for the VIN, so presumably it was coded.
The 5099450AA and 5099541AA are in the parts manual and has one as export and the other domestic we would guess but are listed in parts departments as left and right.

There is a door lock module, it is the part with the latch that pops up and down and obviously one for the left door and one for the right door. It has the air/vacuum line going to it to operate the lock.

Strangely the guy in my u tube video above says the 509450AA which is the export# (50995540AA domestic) is the SKREEM unit which is Mercedes part# 170 820 18 26. The Siemens part# may be 5WK4 8698. I have one of them for interest and I recognize what he has in his hands, I doubt it is much use without programming.

There is a mix up in the part numbers somehow that's all I can say.

 

When I go to Mercedes parts suppliers the number 1708201826 is a door lock module that goes in the door.Guess I need to get off my butt and pull it and get the number,huh? :-) When we contacted the Chrysler parts guy today we asked for the "skreem" module and he came up with the 541AA number. ?? I can't afford much more hair loss on this deal.Too thin already !! :-)

 

This is too confusing and we end up going round in circles.
But if we look at the Service manual and go to the page that shows the SKREEM unit behind the dash we see a picture of 170 820 18 26. This part lists at about $1,000 and can be had for about $700.
SKREEM is Sentry Key Remote Entry Module.

 

Thanks 180 :-). I certainly don't want to argue with someone who knows his way around the XF as you do, but I just did a search a bit ago on that Mercedes number and as I stated they showed the door lock module , in the door. I'm not trying to start any chit, just trying to get it straight. :-) Tomorrow after work I will pull my module from behind the dash and TRY to order one accordingly.Thanks again for the help and I will definately post any findings. Norm :-)

 

Yep.. confused .. just waiting for the jury's decision.. LOL.. care to document the skreem access - removal? We have a user that shorted his radio which led to multiple problems that lead to a dealer that lead to a dead car and mega bill 16 weeks later..

 

The instructions to remove and instal it are in post #43. Take out the Instrument cluster and go to it.

 

I will try.I've never tried to document anything such as this and already have the lower dash disassembled. Lol.....and the seat out so my tall butt can get in there. :-) With all that and my CRS we will see what happens. :-) Thanks Guys !!

 

Hello Norm . I replaced module behind dash Siemans 1708201826 is the actual part. you will see back there. To order from Chrysler it was part no 5099541AA called [ door lock module] only $135' in diagram its by door . Took door apart looking for it THERE WERE NO MODULES. So figured I would order it and see what I got after seeing that part no. had worked for somebody else. Received the Siemans module. The package had actually come from Mercedes who refused to sell to me directly. I had talked to a good Mercedes mechanic and he said plug in module turn on key and wait a couple seconds before engaging starter and sometimes they will program themselves. I did so and it started. PS tried replying to your Email but came back unsendable.

 

THANK YOU Mr. NPD !!! Pretty much what you have explained is what you wrote in your previous post.As you found out, it is/was confusing. Considering the fact that the Siemans number AND the Chrysler number both come up SHOWING they're in the door has led to my confusion and a few others as well.I have a local Mercedes source and a Chrysler source that's a couple thousand miles away. I will be in contact with them this morning and more than likely have a module on it's way soon.Thanks AGAIN for clearing this up ! I will let the forum know how my particular situation unfolds. Norm :-)

 

Let's get this straight the # 170 820 18 26 is the Mercedes part number. The 170 is the Mercedes series car the part was first used on. The part has the Mercedes logo on it. There is another number on it,5WK4 8698 and that is probably the Siemens part number.
The part has written on it "Homologation see owner manual'. So some step is required to align it with the cars security system.
My previous post explains what I have gathered about the 5099540AA and 5099451 AA numbers, which left me confused.

 

Update 11/28/14 I went out to start my 200 Roadste on Tuesday of this week, 13K miles and experienced the same problem as before in November 2013: lights, horn, everything working but when turn key no sound (almost like key not being recognized. I had the dealer replace the door lock module in November 2013 -- could the module go bad in this short time frame (don't drive car very often). I did notice a whinning sound (skretching coming from behind the vents over the radio) when I turned the key to ON position. Never heard the whinning sound when I originally bought the car. Not sure what part would be located in this area. Any suggestions would be appreciated.

Update2/20/14: The Part #5099541AA was installed and seems to have solved my problem. I was wondering if Chrysler dealer is writing the wrong part # on the invoice. I would be interested in the outcome and what is the correct Chrysler part #.
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[QUOTE=autumnmass;768002]Update 11/21/13. Picked up my car yesterday from dealership, slip states that no start was caused by internal SKREEM error, Part #5099541AA door lock module, which was covered under warranty. However can't believe that dealership quoted me $750-$800 to fix w/o warranty. I had to argue w/them to have part covered. Noticed that TPMS light came on while driving it home, but suspect that is due to cold weather and tires probably need more air. Just wanted to update everyone in case you have similiar problems with car not starting (no crank). Thanks everyone for all your help.
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Here is the inside look at the SKREEM #170 820 18 26.
There are three plugs that attach to it, the one on the left says CAN, the next says ANT, the third has no markings. There are 2 pins in the 1st and 2nd and 18 pins in the third.

The black rectangular object in the top right corner is actually silver, it is reflecting my camera color.

 

In that picture there are 4, 8-leg PROM's. Does anyone know the numbers on those?

 

I took the picture. I'll get them.

 

Sweet, thanks 180. I think I could get used SKREEM's to work without the need for programming if I have the original and the donor.

 

180, thanks for posting pic and part numbers!

 

Great news, these things are easy to repair IF you know what you are doing and IF you know what is wrong with it.
If you want any more part numbers let me know.
These modules are going from $30 and up on eBay used.
Good luck.





You are quite welcome.

 

Not sure I'm going to dive into fixing, but replacing with a $30 used one would be nice. My understanding is people need a virgin one from Chrysler ($1000+?), plus the coding. If I'm right on what I think I could do, it'd be like $150 for my work, $30 for the module and the original, which I'd keep for the possibility of fixing.

 

As far as I see getting a module that works after sending away a failed one is called fixing.
There are reman shops that "fix" them.
CLICK

 

True lol.

I wonder if there are any differences in ours vs other Chryslers... Hmm.