BAS/ESP intermitent warning

[bondingi]

After looking through the forum this seems about the most common thread. We have just got a C220 CDI 2002. Fantastic car but now and then the BAS/ESP fault comes up. Turn the car off and it disapears, sometimes returns sooner sometimes not at all. Is this the infamous brake light switch I have read so much about.

 

[television]

It should be,most are solved with a new switch. £8.75 + vat, held on with a 17mm nut, 2-3 wires to transfer.

Malcolm

 

[bundy]

It should be,most are solved with a new switch. £8.75 + vat, held on with a 17mm nut, 2-3 wires to transfer.

Malcolm

NOT HELD ON WITH A 17MM NUT!!
the brake light switch on a c class,e class, s class etc are simply twisted into the bracket whilst holding the locating lugsbetween finger & thumb! if your looking for a 17mm nut you might be there all day lol

regards ted

 

[Yosser]

I've had this problem with my c180.

I replaced the brake light switch but the fault still appears occasionally, although it's only the BAS light now - not the ABS.

The fault light clears if the ignition is switched off and on.

I suspect a wheel sensor, but am not sure.

As Bundy said, on my car the brake light switch twisted off - there was no nut.

 

[psmart]

I've had this problem with my c180.

I replaced the brake light switch but the fault still appears occasionally, although it's only the BAS light now - not the ABS.

The fault light clears if the ignition is switched off and on.

I suspect a wheel sensor, but am not sure.

As Bundy said, on my car the brake light switch twisted off - there was no nut.

Check this thread: http://forums.mercedesclub.org.uk/showthread.php?t=17347

I was told it was only on sequentronic, but perhaps theirs a wiring loom issue with other C-Classes.

 

[bondingi]

so sorry for being dumb but what is sequetronic??

 

[bondingi]

i have a 220cdi c class. The gear lever looks like a conventional auto but you can manually change the gears by pushing the gear lever left or right when in drive. On my BMW this was called Tiptronic

 

[psmart]

Hi Bondingi,

Sequentronic is a Manual gearbox with a computer operated clutch. Internally, it looks very similar to an Auto-box, ie large brake pedal, accelerator pedal, no clutch pedal. The Gear lever has Auto, +/-, Reverse and Neutral.

You can tell the difference between Sequentronic and Auto by smoothness, Auto is more smooth, but sequentronic is a compromise. It has nearly all the benefits of a manual (other than being able to control the clutch manually) and some of the benefits of Automatic.

 

[bondingi]

went to the Merc dealer and guess what the car doesnt have a brake light switch, they tell me the switch is part of some unit. The fault warning is so intermitent that I guess there is a faulty sensor etc

 

[robbi-wan]

Hi Bondingi,
No brake light switch eh? Sounds like b*****ks to me...
From the symptoms described - it sounds bang on like a brake light switch to me.
If i was in your position (which i was) - spend a tenner on a new switch and change it yourself. If it is not the switch - you've lost a tenner but got a spare switch, and if it is - sorted.
There are reports on this forum of around £100 bills from a dealer do to this, and it really is simple. By far the most difficult thing is contorting your way to get at the switch
rob

 

[television]

went to the Merc dealer and guess what the car doesnt have a brake light switch, they tell me the switch is part of some unit. The fault warning is so intermitent that I guess there is a faulty sensor etc

Just for now can I have the 6 first numbers of your VIN.

Malcolm