Omega Owners Forum

Chat Area => General Car Chat => Topic started by: Auto Addict on 24 January 2019, 09:49:22

Title: MB Hold system
Post by: Auto Addict on 24 January 2019, 09:49:22
The brake hold has stopped working on my C class.

Anyone got any ideas please?
Title: Re: MB Hold system
Post by: Doctor Gollum on 24 January 2019, 11:41:04
Check the menu settings  ;) might have inadvertently unticked an option :-\
Title: Re: MB Hold system
Post by: Auto Addict on 24 January 2019, 16:36:55
Check the menu settings  ;) might have inadvertently unticked an option :-\

No Menu settings for it, funny thing is neither have worked all day, until I just drove home from somewhere, both were working OK.

Wondering if battery voltage was low :-\ :-\ :-\
Title: Re: MB Hold system
Post by: Doctor Gollum on 24 January 2019, 17:07:49
Also possible  :-\
Title: Re: MB Hold system
Post by: tunnie on 24 January 2019, 17:35:02
2014 E Class I used, Aux battery was dead and main one not in great condition, hold function still worked fine.

Have a code reader?
Title: Re: MB Hold system
Post by: Auto Addict on 25 January 2019, 07:58:01
2014 E Class I used, Aux battery was dead and main one not in great condition, hold function still worked fine.

Have a code reader?

Yes, I've got a code reader, obvious thing to do really :-[
Title: Re: MB Hold system
Post by: biggriffin on 25 January 2019, 07:58:49
Got hill hold, on this Volvo, it's bloody useless, switch it on, get to traffic lights on slope, engaged--- then the bloody thing dis-engages... Sod it use aux-trailer brake.
Title: Re: MB Hold system
Post by: Marks DTM Calib on 25 January 2019, 08:16:32
Its a function of the ABS unit so make sure you check code status in that module
Title: Re: MB Hold system
Post by: Auto Addict on 25 January 2019, 08:47:14
Its a function of the ABS unit so make sure you check code status in that module

 :y
Title: Re: MB Hold system
Post by: Auto Addict on 25 January 2019, 09:28:58
The good news is - no fault codes.

The bad news - battery voltage low.
Title: Re: MB Hold system
Post by: tunnie on 25 January 2019, 13:43:39
The good news is - no fault codes.

The bad news - battery voltage low.

Put it on a trickle charger overnight, see if it fixes problem?
Title: Re: MB Hold system
Post by: Migv6 le Frog Fan on 25 January 2019, 17:45:35
The brake hold has stopped working on my C class.

Anyone got any ideas please?

A brick.  :y     :D
Title: Re: MB Hold system
Post by: Kevin Wood on 25 January 2019, 21:45:58
The brake hold has stopped working on my C class.

Anyone got any ideas please?

A brick.  :y     :D

.. or one of those antiquated lever things between the seats - that never seemed to go wrong. :P
Title: Re: MB Hold system
Post by: Nick W on 25 January 2019, 21:59:51
The brake hold has stopped working on my C class.

Anyone got any ideas please?

A brick.  :y     :D

.. or one of those antiquated lever things between the seats - that never seemed to go wrong. :P


They do, but a seized or broken cable is easy to diagnose and cheap to fix.
Title: Re: MB Hold system
Post by: Andy B on 25 January 2019, 22:19:28
The brake hold has stopped working on my C class.

Anyone got any ideas please?

A brick.  :y     :D

.. or one of those antiquated lever things between the seats - that never seemed to go wrong. :P

Have you looked inside a Merc? ::)

 Merc has used a US style foot operated parking brake for a good number of years.  ;)
Title: Re: MB Hold system
Post by: TheBoy on 26 January 2019, 09:23:56
Merc has used a US style foot operated parking brake for a good number of years.  ;)
If they hadn't done away with designers, that would be easily fixed at the next facelift/model ;)
Title: Re: MB Hold system
Post by: Andy B on 26 January 2019, 10:43:00
Merc has used a US style foot operated parking brake for a good number of years.  ;)
If they hadn't done away with designers, that would be easily fixed at the next facelift/model ;)
I quite like it there ..... it frees space up in the middle for something else & besides .... I rarely use it anyway.  ;)
Title: Re: MB Hold system
Post by: Auto Addict on 29 January 2019, 09:00:26
Looks like it was caused by the aux. battery being low, seems fine now :y
Title: Re: MB Hold system
Post by: Marks DTM Calib on 29 January 2019, 12:13:37
Looks like it was caused by the aux. battery being low, seems fine now :y

But why was it low?
Title: Re: MB Hold system
Post by: 2boxerdogs on 29 January 2019, 12:57:07
The brake hold has stopped working on my C class.

Anyone got any ideas please?

A brick.  :y     :D

.. or one of those antiquated lever things between the seats - that never seemed to go wrong. :P

Have you looked inside a Merc? ::)

 Merc has used a US style foot operated parking brake for a good number of years.  ;)
.   





My E class has this very simple to use & never had any problems with it
Title: Re: MB Hold system
Post by: Doctor Gollum on 29 January 2019, 12:59:57
They're a bit of a fiddle with a manual box, but are tried and tested :y
Title: Re: MB Hold system
Post by: STEMO on 29 January 2019, 13:08:01
So....how would you do a hill start if you need a third leg to let the parking brake off as the clutch bites?
Title: Re: MB Hold system
Post by: STEMO on 29 January 2019, 13:08:41
Ah......'hold' system......I see.
Title: Re: MB Hold system
Post by: Andy B on 29 January 2019, 13:12:31
So....how would you do a hill start if you need a third leg to let the parking brake off as the clutch bites?

You only put the brake ON with your foot .... there's a hand operated release handle  ;)
Title: Re: MB Hold system
Post by: Andy B on 29 January 2019, 13:12:57
Ah......'hold' system......I see.

yes ..... your left foot  ::) ::)
Title: Re: MB Hold system
Post by: STEMO on 29 January 2019, 13:30:18
Ah......'hold' system......I see.

yes ..... your left foot  ::) ::)
That's right...the one you use for the clutch on a manual  ::)
Title: Re: MB Hold system
Post by: Kevin Wood on 29 January 2019, 13:56:14
So all the design needs is a little light to tell you to keep driving around and avoid hills when the aux. battery level is low. ::)


.. or a handle between the seats.
Title: Re: MB Hold system
Post by: Andy B on 29 January 2019, 13:59:51
So all the design needs is a little light to tell you to keep driving around and avoid hills when the aux. battery level is low. ::)


.. or a handle between the seats.

... or use your left foot  :y :y
Title: Re: MB Hold system
Post by: STEMO on 29 January 2019, 14:39:01
So all the design needs is a little light to tell you to keep driving around and avoid hills when the aux. battery level is low. ::)


.. or a handle between the seats.

... or use your left foot  :y :y
I still don't see how that would work in a manual.
Title: Re: MB Hold system
Post by: Viral_Jim on 29 January 2019, 15:02:45
So all the design needs is a little light to tell you to keep driving around and avoid hills when the aux. battery level is low. ::)


.. or a handle between the seats.

... or use your left foot  :y :y
I still don't see how that would work in a manual.

Left foot on clutch, right on the noisy pedal. Find the bite point and pull the handle on the dash that disengages the "handbrake".

The two downsides (on the merc van I was using at the time) were that it was binary, so if you didn't have enough bite on to hold the van, you'd better get on it quick as you're rolling backwards  :D. And it made a lout "pang" noise when it disengaged.

Not as good as a proper handbrake on a manual car imo, but fine on an auto.
Title: Re: MB Hold system
Post by: STEMO on 29 January 2019, 15:46:24
So all the design needs is a little light to tell you to keep driving around and avoid hills when the aux. battery level is low. ::)


.. or a handle between the seats.

... or use your left foot  :y :y
I still don't see how that would work in a manual.

Left foot on clutch, right on the noisy pedal. Find the bite point and pull the handle on the dash that disengages the "handbrake".

The two downsides (on the merc van I was using at the time) were that it was binary, so if you didn't have enough bite on to hold the van, you'd better get on it quick as you're rolling backwards  :D. And it made a lout "pang" noise when it disengaged.

Not as good as a proper handbrake on a manual car imo, but fine on an auto.
Thanks, Jimmy  :y

Pang?  Or paaaaaaang?  ;D
Title: Re: MB Hold system
Post by: Kevin Wood on 29 January 2019, 16:03:17
So all the design needs is a little light to tell you to keep driving around and avoid hills when the aux. battery level is low. ::)


.. or a handle between the seats.

... or use your left foot  :y :y
I still don't see how that would work in a manual.

Left foot on clutch, right on the noisy pedal. Find the bite point and pull the handle on the dash that disengages the "handbrake".

The two downsides (on the merc van I was using at the time) were that it was binary, so if you didn't have enough bite on to hold the van, you'd better get on it quick as you're rolling backwards  :D. And it made a lout "pang" noise when it disengaged.

Not as good as a proper handbrake on a manual car imo, but fine on an auto.

That's OK. We can do "binary". :y
Title: Re: MB Hold system
Post by: Viral_Jim on 29 January 2019, 16:35:21

That's OK. We can do "binary". :y

I've read there are only 10 types of people in the world... ::)


 ;D
Title: Re: MB Hold system
Post by: STEMO on 29 January 2019, 16:40:51

That's OK. We can do "binary". :y

I've read there are only 10 types of people in the world... ::)


 ;D
Or......there are only three types of people in the world. Those who can count and those that can't.  ;D
Title: Re: MB Hold system
Post by: Andy B on 29 January 2019, 17:09:27
So all the design needs is a little light to tell you to keep driving around and avoid hills when the aux. battery level is low. ::)


.. or a handle between the seats.

... or use your left foot  :y :y
I still don't see how that would work in a manual.

Left foot on clutch, right on the noisy pedal. Find the bite point and pull the handle on the dash that disengages the "handbrake".

The two downsides (on the merc van I was using at the time) were that it was binary, so if you didn't have enough bite on to hold the van, you'd better get on it quick as you're rolling backwards  :D. And it made a lout "pang" noise when it disengaged.

Not as good as a proper handbrake on a manual car imo, but fine on an auto.

 ... and they're no good for handbrake turns  ;D
Title: Re: MB Hold system
Post by: TheBoy on 29 January 2019, 17:39:53
I live a lever. Makes 3 point turns far easier and quicker.

Needless to say electric handbrakes as satans work as well
Title: Re: MB Hold system
Post by: 2boxerdogs on 29 January 2019, 17:42:21
I love liver 😀😁😂
Title: Re: MB Hold system
Post by: STEMO on 29 January 2019, 17:47:08
I live with my lover  ;D
Title: Re: MB Hold system
Post by: Andy B on 29 January 2019, 20:32:57
I live with my lover  ;D
I love liver 😀😁😂
;D ;D ;D ;D
Title: Re: MB Hold system
Post by: Auto Addict on 06 February 2019, 09:26:43
Looks like it was caused by the aux. battery being low, seems fine now :y

But why was it low?

Aux. battery wasn't low, I misdiagnosed it.

Seems like the parking brake mechanism needs a good service.

Been parking on the flat and not using the parking brake - everything works fine.
Title: Re: MB Hold system
Post by: Andy B on 06 February 2019, 11:01:17
Looks like it was caused by the aux. battery being low, seems fine now :y

But why was it low?

Aux. battery wasn't low, I misdiagnosed it.

Seems like the parking brake mechanism needs a good service.

Been parking on the flat and not using the parking brake - everything works fine.

But doesn't 'hold' use the normal foot brake system & not the hand/parking brake

Title: Re: MB Hold system
Post by: Doctor Gollum on 06 February 2019, 11:36:22
Looks like it was caused by the aux. battery being low, seems fine now :y

But why was it low?

Aux. battery wasn't low, I misdiagnosed it.

Seems like the parking brake mechanism needs a good service.

Been parking on the flat and not using the parking brake - everything works fine.

But doesn't 'hold' use the normal foot brake system & not the hand/parking brake
This...  ;)
Title: Re: MB Hold system
Post by: henryd on 06 February 2019, 12:39:39
Looks like it was caused by the aux. battery being low, seems fine now :y

But why was it low?

Aux. battery wasn't low, I misdiagnosed it.

Seems like the parking brake mechanism needs a good service.

Been parking on the flat and not using the parking brake - everything works fine.

But doesn't 'hold' use the normal foot brake system & not the hand/parking brake

yes :y
Title: Re: MB Hold system
Post by: Andy B on 06 February 2019, 16:01:01
Looks like it was caused by the aux. battery being low, seems fine now :y

But why was it low?

Aux. battery wasn't low, I misdiagnosed it.

Seems like the parking brake mechanism needs a good service.

Been parking on the flat and not using the parking brake - everything works fine.

But doesn't 'hold' use the normal foot brake system & not the hand/parking brake

yes :y

So Barry has mis-mis-diagnosed the fault   ;)
Title: Re: MB Hold system
Post by: STEMO on 06 February 2019, 16:24:38
Looks like it was caused by the aux. battery being low, seems fine now :y

But why was it low?

Aux. battery wasn't low, I misdiagnosed it.

Seems like the parking brake mechanism needs a good service.

Been parking on the flat and not using the parking brake - everything works fine.

But doesn't 'hold' use the normal foot brake system & not the hand/parking brake

yes :y

So Barry has mis-mis-diagnosed the fault   ;)
Silly old duffer  ;D
Title: Re: MB Hold system
Post by: Auto Addict on 06 February 2019, 18:58:57
Looks like it was caused by the aux. battery being low, seems fine now :y

But why was it low?

Aux. battery wasn't low, I misdiagnosed it.

Seems like the parking brake mechanism needs a good service.

Been parking on the flat and not using the parking brake - everything works fine.

But doesn't 'hold' use the normal foot brake system & not the hand/parking brake

yes :y

So Barry has mis-mis-diagnosed the fault   ;)
Silly old duffer  ;D

Less of the old :P
Title: Re: MB Hold system
Post by: Auto Addict on 06 February 2019, 19:03:59
The main starter battery has started to lose it's charge, the aux. battery reads 13.1v.

Not using the parking brake, which is sometimes difficult to release, seems to have 'cured' the 'HOLD'.

I suspect, that the parking brake was not fully releasing, affecting the 'HOLD' system.

That's my theory anyway.

A job for when the weather get's a bit warmer.
Title: Re: MB Hold system
Post by: Auto Addict on 06 February 2019, 19:21:39
Is this a no brainer :-

https://www.eurocarparts.com/car-battery

https://www.halfords.com/motoring/bulbs-blades-batteries/car-batteries/halfords-115agm-start-stop-agm-12v-car-battery-4-year-guarantee
Title: Re: MB Hold system
Post by: Doctor Gollum on 06 February 2019, 19:26:21
The main starter battery has started to lose it's charge, the aux. battery reads 13.1v.

Not using the parking brake, which is sometimes difficult to release, seems to have 'cured' the 'HOLD'.

I suspect, that the parking brake was not fully releasing, affecting the 'HOLD' system.

That's my theory anyway.

A job for when the weather get's a bit warmer.
The abs sensor might pick up that the wheel speed is off for the known conditions (ie hand brake released/brake pedal/gear/ throttle positions etc) but the parking brake is mechanically identical in operation to the Omega one... The only difference being the fact that it's foot operated rather than hand operated ;)

Ignoring the parking brake servicing is an open invitation to more expensive repairs including the wheel bearings...