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1983 Mercedes SL 500 V8 R107 Red with cream/mushroom leather :P
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Discussion Starter #1
Hi there,

Great forum this. Been reading through the forums about Crank Position Sensor failures and it appears this is what is suddenly plaguing my wonderful 1983 500 SL R107.

When it's been running hot for a while, it'll cut off, dead, and won't restart.

This has happened at lights, and on the motorway doing 75mph! Shocking!

About an hour later, it'll start perfectly.

An when it does, it drives like the smoothest car I've every driven. pure V8 bliss... which makes it even more frustrating.

Before it last cut out, I've done around 300 mile since the fault occured.

I've have a couple of specialists look at it but they've never been able to replicate the issue, hence it's not been fix.

But from what I've read, the CPS seems to be the culprit.

I've located a few on Autohaus but not entirely sure of the part number as they say they deal in US spec (mine's a UK model).

Q: does any one know the CPS part number or Bosch equivalent?

and more importantly, does anyone know (or have a pic or pics) of where I find the CPS on my 1983 R1709? I've search high and low but I'm driving myself crazy.

Any help on the above would be most helpful indeed.

James

[email protected]
 

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R/C107 Moderator
1986 560SL: '84 500SL: '84 280SL 5 speed: other 107s
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32,330 Posts
Welcome to the forum.

001 153 84 28. Same as '83 U.S. 380SL.
Check the on line service manual (link in the EGV 107) for location and fill in your profile.
 

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82 380SL 96 SL500 03 SL500
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6,164 Posts
I don't think you'll find a CPS on your car, and if I'm wrong, I believe it'll be there but connected only to a diagnostic port.

A problem like yours on a later 129 model 500SL would probably be the CPS.

On a 107, though, your problem is often fixed by replacing the fuel pump relay.
 

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R/C107 Moderator
1986 560SL: '84 500SL: '84 280SL 5 speed: other 107s
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32,330 Posts
I don't think you'll find a CPS on your car, and if I'm wrong, I believe it'll be there but connected only to a diagnostic port.

A problem like yours on a later 129 model 500SL would probably be the CPS.

On a 107, though, your problem is often fixed by replacing the fuel pump relay.
That is it. Actually TDC sensor on the 107. That is the part I posted. Don't think it would cause the symptoms he describes but he just asked for the part number and location.
 

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1983 Mercedes SL 500 V8 R107 Red with cream/mushroom leather :P
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16 Posts
Discussion Starter #8
Thanks for the replies.

Sorry, do you have a direct link to the on lin manual (EVG R107?)?

So you suspect the Fuel Pump Replay? The car did cut out whilst being run on a ramp for a few hours. The mechanic raced round to check electric charges going to various component but they say everything was seemed to be functioning fine...

In that case do you have the position of the FPR in my model? I have searched in the past behind the glove box, having read it should be near the Idle Control Unit but no joy, to my eyes. Could it be high in the foot well area / driver's side, sort of above the easy to reach fuses?

Any pics of the CPS or the FPU locations would be massively appreciated if anyone's is a position.

Again, my email is [email protected] if that's of help.
 

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R/C107 Moderator
1986 560SL: '84 500SL: '84 280SL 5 speed: other 107s
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32,330 Posts
EGv107 is a sticky at the top of the main 107 forum page. A compilation of links and DIY posts. http://www.benzworld.org/forums/r-c107-sl-slc-class/1450550-encyclopaedia-germanica-volume-107-aka-egv107.html
On line service manual.Model 107 The problem is it is U.S. (LHD) Models only. Helps with general info. on yours if you use the same year '380SL as a guide.

There are several UK and AU members here with RHD models so together we should be able to help.

The TDC sender is located near the timing mark on left side of the engine. Remember Right and Left are described looking at the rear of the vehicle.
 

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1983 Mercedes SL 500 V8 R107 Red with cream/mushroom leather :P
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16 Posts
Discussion Starter #10
Cheers, rowdie!

Amazing info on here. Off to do some much needed R107 homework...
 

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R/C107 Moderator
1986 560SL: '84 500SL: '84 280SL 5 speed: other 107s
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32,330 Posts
Picture #1 through the glove box opening on my LHD '84 500SL. Fairly certain the relay on the right is fuel pump.

Picture #2. Could not get the TDC sensor but tried to show location. The 500SL does not have a Crank Position Sensor. The 560SL '86-'89 does but that is KE Jet not K-Jet. It is my understanding that the TDC sensor does not control any system.
 

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1983 Mercedes SL 500 V8 R107 Red with cream/mushroom leather :P
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Discussion Starter #12 (Edited)
Pics

Thanks Rowdie.

Only just seen your pics, however I took these earlier. Are either of these the FPR?

The smaller item (pics 1&2) was found above the fuses in the footwell in my RHD model (the link you gave me earlier points the FPU being there on RHD)

The larger item I found at the back of the glove box (pics 3&4)
 

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1983 Mercedes SL 500 V8 R107 Red with cream/mushroom leather :P
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Discussion Starter #13 (Edited)

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R/C107 Moderator
1986 560SL: '84 500SL: '84 280SL 5 speed: other 107s
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32,330 Posts
002 545 41 32. Speed switch used for transmission.
000 821 08 63. Wiper relay

Fuel Pump is 001 545 34 05

These number are from the MB Electronic parts catalog.
 

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1983 Mercedes SL 500 V8 R107 Red with cream/mushroom leather :P
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16 Posts
Discussion Starter #16
If this actually it, is there a way to test the FPU?

Baring in mind that it seems to be an intermittent, heat related fault.


Sent from my iPhone using Autoguide
 

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1983 380SL, E350 4matic, C230 Sport
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Awesome information from this forum for my 1983 380SL which I am experiencing the same problem!
 
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