Finally getting to Crumpy's Security module repair.
What a mess under that foam. Appears the previous owner had already been in there.


What I cannot find is a new module. Mercedes says they "have no idea from the part number"


Does anyone know the Mercedes number for the part?


Delphi A 193 820 01 26

Otherwise I'm going on Fleabay.


Thanks

 

The number can be found on this ebay search.
It is A170 800 08 48, they are not cheap.

That Delphi number you give is a Mercedes number, is that the number on the one in your trunk?
The 193 number means it is a specific Crossfire number and made for the Crossfire, they did not relabel parts for the Crossfire.
The spare one I have is the one used in the search.
If you have water damage then it is probably best to get a pump that has the plugs in the sockets, the plugs get ruined by the water and buying a pump without the plugs may mean a long search for just the plugs and extra cost.

 

Dave, I was hoping you would see this. Thanks


Well, my first encounter with a Mercedes parts Dept they said NO.


The Pump is fine. It is the relay that is corroded. Circuit board is covered in corrosion.


I will be sealing everything up in plastic and silicone. I just need the part. perhaps another stealership will be more helpful.


The one on E-bay is used. I'm going new if I can source it.

 

What relay? Inside the pump?
Is it shown in this thread? (CLICK)

 

Dave, It is a small Black plastic box about 7 mm X 6mm X 3Mm with a six pin connector. Mounted on the floor pan metal just to the right of the pump assy.


Here's one on E-Bay
http://www.ebay.com/itm/321900612506?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

 

The mean the sizes are 70 x 60 x 30 mm, your measurements would make it pretty small.
You mean this module shown mounted behind the pump under the metal shield? It is the anti towing module that sets off the alarm if the car is tilted.
Thank heavens it is not the pump, that part costs 1/10 th. the pump cost. Look at the pump while you are there and test it before you put it all together again. If that got wet maybe the pump got wet as well.

 

Okay, that helps.


This is all about the Fog lights remaining on. So I guess I have to play with some wires.

 

The fog light problem is most probably the security pump, open it up and look for damage from water, you should get a hint of trouble if the plastic case looks as it has sat in water.
See here (CLICK) for the problem of water damage and opening the module.

 

The Foam box around the pump module was damp. Now that we have removed it and things have dried out, the parking lights work fine. The Fog lights also work fine. Only the interior lights are functioning improperly. They do not come off when you close the doors or dim down when the car is started or placed in gear. Is there another relay or relay timer involved?




I'm going to leave things open to thoroughly air out and then remove the rubber plugs as many have done.


Time to take the wing of anyways and re seal it.


Thanks for the help Dave.

 

Since you provided the excellent pictures on how to take it apart, I did. Circuit board in the Pump module was soaking wet and several circuits were obviously compromised.
My thanks to Fast forfun2 for the excellent pictorial. Even my dumb@ss brain could follow it.

New Pump off E-bay for $450, used ones for $300 to $450.


Buy IT Now!


Done .


Thanks again Dave

 

I would open up the pump and let it dry inside the house for some time if you have not already done that.

 

rinse water out with alcohol, and blow dry, clean any contacts with q-tips, that kind of thing. It may be salvageable

 

Seems like a waste of good scotch to me.

 

Nope, corrosion and visible arcing on the circuit board. I may try to salvage as a backup spare later. Crumpy is complainin,' So, I gotta get this SRT on the road again.

 

Did and done, That's how we got everything else working. To me it is unreliable for a wife's car to have this way. No amount of scotch can absolve that responsibility when she calls me from say "Indiana."

 

Thanks all, for the interesting insight. No apparent water intrusion in (Mrs.) Roadster when I checked not long ago. (Kept the loose window sealed with duct tape & pillows in 2013 before replacement) I did drill (about 1/4") drain hole in trunk as precaution. (must not drive thru any rivers!) & please don't waste any scotch, bourbon, rum or moonshine!

 

Well, Installed the NEW pump unit today. All is well. For reasons I do not fathom, the engine now starts without hesitation. I have no idea of the connection but it usually took a few turns to fire. Now it is instantaneous.


Hardest part of the project was getting all the interior parts back in. The guys who installed the new headliner had broken a lot of the clips. New ones were $5 apiece so I cheated and used the closest cheap ones on the shelf/rack.


I did remove the rubber plug in the well as many Have done. Put the pump inside the foam and covered that with a poly bag Loosely wire tied around the wire and hose bundle before I closed up the compartment.


And now ALL the lights function as designed.


Speaking of design, why in the hell did Diamler design something which is inherently subject to failure? Surrounding a circuit board with a sponge and placing it in the bottom of a well where any leaks or spill would go. And then, calling it, hell giving it the function of a "Security Module" German engineering is usually superb.


However, I must remember that Germans once built big dirigibles and filled them with explosive gas. Flying through clouds, and operating electric appliances aboard, what were the odds of a spark?

 

With schnapps, everything sounds like a good ideal !

 

Not to change the subject but you did mention dirigibles. CLICK

 

Those were magnificent airships.
Much like clipper ships, magnificent and yet, destined to oblivion.


Thanks Dave. You made my rather mundane thread kinda special