Mercedes Sat Nav in a W123 - Page 2

V12 · 20-11-2009, 11:43 AM

On my old 190 i tested it with a multimeter. It spiked very quickly at around 2v from memory and the faster i drove the faster the frequency between the spikes but the voltage stayed at 2volt'ish...was about 5 years ago though.

Stratman · 20-11-2009, 12:07 PM

The reason the voltage stays the same is that the 'mark/space' ratio of the signal stays the same. This is the ratio between the width of the pulse (mark) and the gap between the pulses (space). As the speed increases so does the frequency of the pulses, but the ratio doesn't change. 2V implies a mark/space of about 1:6

What you need is a frequency meter. Some multimeters have a frequency function which would do the job.

V12 · 20-11-2009, 12:43 PM

I'm glad someone knew what i was trying to say and interpreted it into proper technical speak!!

jaymanek · 20-11-2009, 07:01 PM

guys it worked!!

Hooked up a wire from pin 1 of the iso plug to the green and black wire of the plug on the back of the speedo and hey presto my sat nav knew where i was once i started moving!

SOLVED!

Thanks to everyone who input above otherwise id be "magnetising my tire"

Stratman · 20-11-2009, 07:25 PM

Great job.

Now you need to tell it the tyre size and how many pulses per revolution it is getting. On COMAND the tyre size can be done from the unit itself but the number of pulses needs STAR. I don't know about APS though, other than it will almost certainly need to be done.

jaymanek · 21-11-2009, 10:29 AM

Yep ill enter the tyre size in as i dont think its quite right.. its telling me to prepare to turn ages before the turn!

jaymanek · 23-11-2009, 12:51 PM

guys on the back of the unit there is another plug that looks like it takes a standard gps aerial... anyone know what this is for?

obviously I have used the mercedes gps plug..

Bryn Jones · 10-07-2010, 11:34 AM

I have been following this thread and can now contribute as I have found a solution. I have successfully fitted a Becker Traffic Pro to my W123 239TE and have the satnav working fine by fitting a speed pulse generator to the speedo head. It is sold by Sailes Developments Ltd in the Uk. It fits between the speedo head and the end of the speedo cable and is originally intended to fit at the gearbox end of the cable but as the merc manual gearbox fitting isn't threaded at this end it won't fit here. Consultation with their tech dept though advised that it could be fitted at the speedo head end providing there is room which there is just.
The model no is Hunter Speed Sensor 65H and their phone no is 01386 554210. Any tech queries select option 2 and speak to Matthew.
The Alpine NVE-K300 that has been mentioned elsewhere is I have found no longer available and no UK suppliers seem to have any stock left but this is a better solution apart from the need to pop the dash out which is quite straightforward and is covered elsewhere on the forum.
Any further queries I will try to help.

jaymanek · 10-07-2010, 01:52 PM

actually my W123 already had a speedo pulse at the back of the speedo.. there was a plug there, i connected to it and my sat nav started working!

vibesg · 11-07-2010, 01:28 PM

Don't know if you posted pics of your Navigation system Jay. Will appreciate some.

tonysmallz · 11-07-2010, 02:16 PM

Quote:

Originally Posted by vibesg

Don't know if you posted pics of your Navigation system Jay. Will appreciate some.

defiantly been soon as i saw the thread title have been looking forward to some pics

jaymanek · 11-07-2010, 02:22 PM

mejermy · 20-07-2010, 02:40 PM

Hello everyone. Picked up this topic whilst searching for methods to retrofit cruise to the above car. I see 'stever' says he did this to a 280CE. Any chance of a DIY or other pointers? I hae a number of local sources for stalks, but unsure of whtas needed at the engine end, and presumably need the speedo with the speed feed. I don't have ABS by the way.

jaymanek · 20-07-2010, 03:17 PM

my car doesnt have ABS either but does have the speed pulse behind the cluster.

mejermy · 20-07-2010, 07:06 PM

Thx for that jaymanek. I'll have a look at the weekend to confirm mine has the speed connection. Any one any idea on what the engine control end requires?

20-11-2009, 07:01 PM	#19
jaymanek Hardcore MB Enthusiast Threadstarter Join Date: Nov 2002 Location: Nuneaton Warwickshire Car: 560 SEC AMG Widebody, 560 SEC AMG, W124 500E, W123 280CE, W123 200, R107-500SL Posts: 10,210	guys it worked!! Hooked up a wire from pin 1 of the iso plug to the green and black wire of the plug on the back of the speedo and hey presto my sat nav knew where i was once i started moving! SOLVED! Thanks to everyone who input above otherwise id be "magnetising my tire" __________________ Mercland is listed here on MBClub please click to see services and discounts available. 1969 280SL Pagoda in Met Light Blue 1980 123-200 in Sahara Yellow 1985 123-280CE in Champagne 1988 500SL in Met Light Blue Now with Leather 1988 560SEC AMG in Midnight Blue 1989 560SEC AMG Widebody 1989 190E 2.5 Cosworth Dogleg Manual 1993 E500 Brabus in Silver with lots of toys! 1 of 29 UK Supplied Cars Gallery Link

20-11-2009, 07:25 PM	#20
Stratman Hardcore MB Enthusiast Join Date: Jun 2003 Location: Sunbury Car: W202 C180 Estate RIP W203 C200 CDI Estate Posts: 1,281	Great job. Now you need to tell it the tyre size and how many pulses per revolution it is getting. On COMAND the tyre size can be done from the unit itself but the number of pulses needs STAR. I don't know about APS though, other than it will almost certainly need to be done. Last edited by Stratman; 20-11-2009 at 07:30 PM. Reason: To add more info

21-11-2009, 10:29 AM	#21
jaymanek Hardcore MB Enthusiast Threadstarter Join Date: Nov 2002 Location: Nuneaton Warwickshire Car: 560 SEC AMG Widebody, 560 SEC AMG, W124 500E, W123 280CE, W123 200, R107-500SL Posts: 10,210	Yep ill enter the tyre size in as i dont think its quite right.. its telling me to prepare to turn ages before the turn! __________________ Mercland is listed here on MBClub please click to see services and discounts available. 1969 280SL Pagoda in Met Light Blue 1980 123-200 in Sahara Yellow 1985 123-280CE in Champagne 1988 500SL in Met Light Blue Now with Leather 1988 560SEC AMG in Midnight Blue 1989 560SEC AMG Widebody 1989 190E 2.5 Cosworth Dogleg Manual 1993 E500 Brabus in Silver with lots of toys! 1 of 29 UK Supplied Cars Gallery Link

23-11-2009, 12:51 PM	#22
jaymanek Hardcore MB Enthusiast Threadstarter Join Date: Nov 2002 Location: Nuneaton Warwickshire Car: 560 SEC AMG Widebody, 560 SEC AMG, W124 500E, W123 280CE, W123 200, R107-500SL Posts: 10,210	guys on the back of the unit there is another plug that looks like it takes a standard gps aerial... anyone know what this is for? obviously I have used the mercedes gps plug.. __________________ Mercland is listed here on MBClub please click to see services and discounts available. 1969 280SL Pagoda in Met Light Blue 1980 123-200 in Sahara Yellow 1985 123-280CE in Champagne 1988 500SL in Met Light Blue Now with Leather 1988 560SEC AMG in Midnight Blue 1989 560SEC AMG Widebody 1989 190E 2.5 Cosworth Dogleg Manual 1993 E500 Brabus in Silver with lots of toys! 1 of 29 UK Supplied Cars Gallery Link

10-07-2010, 11:34 AM	#23
Bryn Jones New Member Join Date: Jul 2010 Car: W113 280sl Pagoda, W123 230TE Posts: 2	speed pulse generator for W123 I have been following this thread and can now contribute as I have found a solution. I have successfully fitted a Becker Traffic Pro to my W123 239TE and have the satnav working fine by fitting a speed pulse generator to the speedo head. It is sold by Sailes Developments Ltd in the Uk. It fits between the speedo head and the end of the speedo cable and is originally intended to fit at the gearbox end of the cable but as the merc manual gearbox fitting isn't threaded at this end it won't fit here. Consultation with their tech dept though advised that it could be fitted at the speedo head end providing there is room which there is just. The model no is Hunter Speed Sensor 65H and their phone no is 01386 554210. Any tech queries select option 2 and speak to Matthew. The Alpine NVE-K300 that has been mentioned elsewhere is I have found no longer available and no UK suppliers seem to have any stock left but this is a better solution apart from the need to pop the dash out which is quite straightforward and is covered elsewhere on the forum. Any further queries I will try to help.

20-11-2009, 11:43 AM	#16
V12 Hardcore MB Enthusiast Join Date: Jun 2002 Location: South Car: CLK270CDI - Daily Posts: 1,613	On my old 190 i tested it with a multimeter. It spiked very quickly at around 2v from memory and the faster i drove the faster the frequency between the spikes but the voltage stayed at 2volt'ish...was about 5 years ago though.

20-11-2009, 12:07 PM	#17
Stratman Hardcore MB Enthusiast Join Date: Jun 2003 Location: Sunbury Car: W202 C180 Estate RIP W203 C200 CDI Estate Posts: 1,281	The reason the voltage stays the same is that the 'mark/space' ratio of the signal stays the same. This is the ratio between the width of the pulse (mark) and the gap between the pulses (space). As the speed increases so does the frequency of the pulses, but the ratio doesn't change. 2V implies a mark/space of about 1:6 What you need is a frequency meter. Some multimeters have a frequency function which would do the job.

20-11-2009, 12:43 PM	#18
V12 Hardcore MB Enthusiast Join Date: Jun 2002 Location: South Car: CLK270CDI - Daily Posts: 1,613	I'm glad someone knew what i was trying to say and interpreted it into proper technical speak!!

10-07-2010, 01:52 PM	#24
jaymanek Hardcore MB Enthusiast Threadstarter Join Date: Nov 2002 Location: Nuneaton Warwickshire Car: 560 SEC AMG Widebody, 560 SEC AMG, W124 500E, W123 280CE, W123 200, R107-500SL Posts: 10,210	actually my W123 already had a speedo pulse at the back of the speedo.. there was a plug there, i connected to it and my sat nav started working! __________________ Mercland is listed here on MBClub please click to see services and discounts available. 1969 280SL Pagoda in Met Light Blue 1980 123-200 in Sahara Yellow 1985 123-280CE in Champagne 1988 500SL in Met Light Blue Now with Leather 1988 560SEC AMG in Midnight Blue 1989 560SEC AMG Widebody 1989 190E 2.5 Cosworth Dogleg Manual 1993 E500 Brabus in Silver with lots of toys! 1 of 29 UK Supplied Cars Gallery Link

11-07-2010, 01:28 PM	#25
vibesg Hardcore MB Enthusiast Join Date: Sep 2007 Location: Cumbria, Used to be in Kent Car: SL 350; Volvo XC90 D5; VW Polo tdi Posts: 313	Don't know if you posted pics of your Navigation system Jay. Will appreciate some.

11-07-2010, 02:22 PM	#27
jaymanek Hardcore MB Enthusiast Threadstarter Join Date: Nov 2002 Location: Nuneaton Warwickshire Car: 560 SEC AMG Widebody, 560 SEC AMG, W124 500E, W123 280CE, W123 200, R107-500SL Posts: 10,210	__________________ Mercland is listed here on MBClub please click to see services and discounts available. 1969 280SL Pagoda in Met Light Blue 1980 123-200 in Sahara Yellow 1985 123-280CE in Champagne 1988 500SL in Met Light Blue Now with Leather 1988 560SEC AMG in Midnight Blue 1989 560SEC AMG Widebody 1989 190E 2.5 Cosworth Dogleg Manual 1993 E500 Brabus in Silver with lots of toys! 1 of 29 UK Supplied Cars Gallery Link

20-07-2010, 02:40 PM	#28
mejermy New Member Join Date: May 2009 Location: Pennines and Languedoc Car: S211, W126, S124, W123, W169 Posts: 11	Retrofit cruise W123 230E 1984 Hello everyone. Picked up this topic whilst searching for methods to retrofit cruise to the above car. I see 'stever' says he did this to a 280CE. Any chance of a DIY or other pointers? I hae a number of local sources for stalks, but unsure of whtas needed at the engine end, and presumably need the speedo with the speed feed. I don't have ABS by the way.

20-07-2010, 03:17 PM	#29
jaymanek Hardcore MB Enthusiast Threadstarter Join Date: Nov 2002 Location: Nuneaton Warwickshire Car: 560 SEC AMG Widebody, 560 SEC AMG, W124 500E, W123 280CE, W123 200, R107-500SL Posts: 10,210	my car doesnt have ABS either but does have the speed pulse behind the cluster. __________________ Mercland is listed here on MBClub please click to see services and discounts available. 1969 280SL Pagoda in Met Light Blue 1980 123-200 in Sahara Yellow 1985 123-280CE in Champagne 1988 500SL in Met Light Blue Now with Leather 1988 560SEC AMG in Midnight Blue 1989 560SEC AMG Widebody 1989 190E 2.5 Cosworth Dogleg Manual 1993 E500 Brabus in Silver with lots of toys! 1 of 29 UK Supplied Cars Gallery Link

20-07-2010, 07:06 PM	#30
mejermy New Member Join Date: May 2009 Location: Pennines and Languedoc Car: S211, W126, S124, W123, W169 Posts: 11	W123 Cruise Thx for that jaymanek. I'll have a look at the weekend to confirm mine has the speed connection. Any one any idea on what the engine control end requires?

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