s600 w140 coupe electrical faults

[bouzirouge]

Hi, when the key is out, it's all dead. key in and turned to 1st position, wipers, lh indicator and hrw all on. switch off. all on. take the key out, all off again. Relay? stalk? both? i'll replace them in that order, see how i get on.

 

[television]

You could just unplug that N10

 

[shayes]

Hi, when the key is out, it's all dead. key in and turned to 1st position, wipers, lh indicator and hrw all on. switch off. all on. take the key out, all off again. Relay? stalk? both? i'll replace them in that order, see how i get on.

Sounds more like the stalk. See my pm's and above threads for Garage in France. over and out as job to do!

 

[bouzirouge]

many many thanks for all the replies. i pick the car up tomorrow at 2. i'll be under the bonnet here by 3. seems it was low on trans oil. we checked all levels before driving it of course, but cold and engine off. seems hot and running is the way. he read the handbook and checked it after i left. anyway seems it's running properly now with 1.5liters of oil in it. where did the old stuff go? ne leaks i can see? i'm almopst embarrased to be admitting to this, but good news is worth sharing.

i'll know more by this time tomorrow. with regard to the relay box. i'll pm you. might be just the thing.

i assume the n10 and the relay behind the fusebox under the bonnet are the same part. if i unplug it will that not leave me still wondering if it's the relay or the stalk?

one more sleep!!!!

 

[shayes]

I've pm'd you Stewart. did you see the garage on Google Earth?

 

[bouzirouge]

code reader

This is for sale. Is this the kind of thing i need to read the codes on my 1994 cl600? If so, how much should i be offering for it? Many thanks in advance.

 

[television]

I sell them for £15 plus postage

 

[shayes]

I sell them for £15 plus postage

Does this unit plug into a multiplug somewhere Malcolm? Can't say I recall seeing one.

 

[bouzirouge]

hi television, your mailbox is full. thanks for your reply. i'm in the market for a code reader. i'd likle one that will read and clear recorded faults on my 1994 s600 coupe. it would be nice if i could use it on other cars too. --obd and obd2? i think i'd prefer a readout rather than a count the flashes kind of thing.

what will the one you sell for £15 do? this is the first one of these tools i will have owned. i'd prefer to get one that will do what i need than buy one only to upgrade it in a few months. please bear in mind i'll need postage to mainland france too. Paypal is the simplest way for me to pay. does that suit you?

 

[bouzirouge]

I managed to drive it home withought incident and have spent a morning familiarising myself with the buttons and switches and making lists of faults.

i removed the relay behind the fusebox. the wipers no longer come on. the l/h indicator still flashes constantly though and the hrw is on all the time. is there another relay for these? see attached picture, ---no it's too big too.

On start-up from cold the engine has a pulsed idle between 0 and 1000rpm. It settles down to tickover at around 700rpm once a little warmer.

There are no warning lights on the dash. SRS stays lit for a few moments then goes out. all seems normal.

Still no performance though much better than it was when i first drove it.

central locking does not work from the key or from the dashboard. yellow and green lights on the door illuminate and the doors lock and unlock individually with the key.

Sqeaking noise from the back over bumps. might go away through time. it's not moved for 18 months.

other than that odd bits and pieces not quite right but nothing some re-assembly, wd40 or some glue won't cure. Any thoughts, hints, cures? don't be shy.

Hi, I'm in the Dordogne, 400+ miles south of le harve, so local specialists are not an option. I'm keen to fix what i can myself before spending money at a specialist if i have to go down that route. i see the code reader as a tool to point me towards what needs checked, not a means in itself. I figure if i take my time and do it bit at a time, with help and support from people who know who have been there already, i ought to be able to get there. At the end of the day, it's only a machine.

 

[mikestrivens]

Yes but one hell of a complex machine. I'd be inclined to get a full and thorough service done on it, by Mercedes or Mercedes indie (probably not many in Dordogne) and get the ATF and filter replaced PDQ.

Rear suspension may just need some PTFE spray, but I had the spheres and hydraulics valve recently replaced on mine and it transformed the drive.

Also check engine for oil leaks, especially at front as crankshaft seal is prone to go. £5 part but the whole of the front has to come off to get at it. Mercedes did a major update on the seals and breathers around 1996/7. I got the top end of my engine rebuilt by Crewe Engines who replaced hundreds of seals and breathers, all of which had hardened with age and were leaking.

 

[television]

My reader is just a blink code reader suitable for cars before any CAN bus system, it is no good for obd2 and that reader is of no use on your car.


The cars that it covers are good till about 06

Read here http://www.mbslk.de/files/artikel/r170_fehlercodes.pdf and it tells you what cars it will test

 

[television]

The N10 relay that you have pulled out also controls the rear window, so if the lamp is on in the control unit the fault is on that.

 

[bouzirouge]

The feelers are out for a french mercedes indie who knows these cars, you never know. failing which it'll need to be taken to the uk.

in the meantime i have to get it to a condition where i can drive it there. if i can get the wipers and indicators working properly, or even just to switch off, and the engine and gearbox to cooperate with each other, i can drive it to an indie where ever he is. just using the thing after it sitting so long with no battery in it will help it greatly. funny how two days with a battery and the performance has improved already.

my order of play is to change the n10, then change the stalk. meantime get a code reader, note the faults. clear the faults. drive it, record the faults. compare lists. change gearbox filter and fluid, engine oil, filters. then work my way through the fault list

anything i've missed?

 

[bouzirouge]

hi television, that seems to be just the thing i need at this stage. does paypal suit you? please include postage to france. email me direct to arrange payment, address etc. regards, stewart.

 

[television]

You diagnostic socket is it the round 38 pin or a square box

 

[r129co]

Sorry to join in so late on....the early coupe multi function relay is 140 820 2426....it is unique to the coupe..140 820 3026 mentioned earlier is for the saloon. In my experience it is the relay and rarely the stalk at fault.Mercedes stopping making that relay until last year. They farmed out manufacture but the results were so poor we are once again without!
i think the bio-degradable line about the wiring harnesses is a fudge. I have heard that they were outsourced and the poor resulting insulation problems was a mistake and a cats-arse-trophe.
I have also heard of recalls in the USA by dealerships after incidences of engine fires to
early M119 and M104 engines.
If this is true it may be a precedent we can all take advantage of.....discuss!