dont panic if its not an instant cure. mine took a good few weeks after replacing the switch before it stopped the light coming on when i was driving. presumably while it became a stored rather than current fault code
One other reason for the light coming on is if the battery has been disconnected. In the owners manual you should see references to the resetting of various warning lights and controls if you remove the battery. I have a CLK and it tells me that I have to put insert the ignition key, turn to position 2 then, turn the wheel hard left and hard right before returning to centre, remove the key then reinsert, after this the BAS light should disappear. I have done this myself and it worked.
so does anyone know where this switch is in a w202? I have travelled up the pedal and all i can see is a black switch with the number 0145450128.
Is this the switch?
My problem is if i stand on the brake pedal like an automatic and switch on the car,(its a manual BTW)all the lights go off. As soon as i come off the brake pedal, the ABS light comes on and does not go off.
If i just switch on the car without stepping on any pedals, the light does not go off at all with the other warning lights.
has a white plunger, black body, and white connector. If you think of the plunger as facing away from you the driver, it is between you and the pedal. it is worked by the pedal being pressed down letting the plunger out. It sits in a hole in a bracket and is fixed by a bayonet type mechanism with a lock button, which you have to press in order to half-turn it to release.
Best bet is go to the Merc dealers and get the parts bod to show you one. You might as well buy it just to rule it out. I've had three go, all at about 75,000 miles.( three separate cars)