Brake Pedal Switch G463

[noman223]

The brake pedal switch is new. The ESP module has also changed. I checked the wiring, everything is fine. But when I press the brake, this fault code is displayed.

 

[wojciech300]

Hi, the most important thing is the gap.
Check WIS: AR42.10-P-0040X.
The gap between the brake light switch (S9/1) and the brake pedal must be 2.5 mm.
Otherwise, the ESP may fail.

 

[mudgle]

Genuine or aftermarket switch? Lately I've seen a lot of bad aftermarket parts for some reason. Even from manufacturers that used to be good. You can also measure the switch itself if you already have one to avoid ruling it out.

 

[BIBSHIGE]

I had the same problem with my W163.
I think it's a clearance issue.
I recommend using genuine parts.

 

[bigchevy66]

As others have said, make sure the switch is properly installed, and you can also watch the actual values change with the scan tool to see if the switch is changing properly. A genuine MB stop lamp switch would be the best option.

With the new switch removed, fully pull out the stop lamp switch plunger until it stops clicking (it should move easily), depress the brake pedal, install the stop lamp switch, let the brake pedal return to the rest position and then pull up on the pedal slightly. You will hear one more click from the stop lamp switch and it will be properly adjusted.

 

[noman223]

I did it very well. I changed the switch position many times. It doesn't help.

 

[Mersovod]

Have you checked the diode?