2004 e320 just replaced the front and rear brakes and now I get the ESP malfunction visit shop.

Your alternator is not putting out enough power to recharge your battery.. Your battery will eventually drain.

Try watching this video on YouTube.com : https://www.youtube.com/watch?v=vx0nwvClTRQ

remove brake fluid filler cap start at the wheel closest to cervo then move away so front to back remove road wheel there is a brake nipple on the caliper put a piece of tubing around nipple and into a jar with clean brake fluid in it loosen nipple get some one to pump brake peddle about 10 times on the final stroke keep peddle pushed to floor then tighten nipple up pump brake peddle a few time should be hard then repeat all wheels rear should only have 1 nipple for rear wheels but check this any way

The ESP switch turns the electronic stability control program on and off.

The ESP assists in your maintaining control of the vehicle when the vehicle loses or is about to lose adhesion with the road surface from the front, the rear or both ends. The program includes selective braking and brake release to individual wheels.

As you have this handling/control feature, you should not run the vehicle with the ESP turned off as long as it is functioning properly. If there is a fault in the system you will normally get a warning display on the dash.

Sean

my friend had the same and he justreplace the brake switch.

It is imperative that you loosen the caliper bleed screw BEFORE you push the piston back into the caliper. Failure to do so WILL damage the ABS hydraulics.

The E320 in that year range upto approx 2005 uses an auxiliary battery to operate the brake pump when main battery supply was lost or low. The low battery warning you describe can be caused by the aux battery being low. This battery is a small 7Ah battery mounted under the pollen filter in the engine area.

I have a e500 03 i have change the front pads and sensors and rear senor. the dash still says BRAKES VISIT SERVICE CENTER. BACK BRAKES ARE FINE. HELP.

Sounds like a rear end ratio problem ECM malfunction

I had the brake light switch replaced by a local dealer. Cost was $140 and it fixed the problem. Have driven the car for two weeks since and no lights and all systems normal.