What does code p2767 means for a cls 500 mercedes benz

SOURCE: My mercedes Benz cls 500

Mercedes uses a service schedule with the letters A-H to denote the relevent maintenance recommended.A is the basic oil service and H is the most inclusive.The intermediate letters correspond to proportional services.The service light should be reset at the completion of the service.This can be done via interface or using the controls and menus on the steering wheel.The specific format for resetting is different for different years and models.Alldata is fairly accurate for reset guidelines,but is not correct on some.Make sure to use synthetic oil in all newer MB,especially with extended oil change intervals.

SOURCE: What does ESP light mean on a cls 500 Mercedes

The ESP system means the Electronic Stability Program. If the ESP lights on the dashboard permanently the ESP system is faulty.
You should access the ESP Electronic Control Unit (ECU) memory for pull out all DTC (Diagnostic Trouble Codes), using diagnostic equipment connected to the data link connector of the car. Then you will be full informed about bad pieces (e.g.: brake pedal switch, front right wheel abs sensor interrupted, ...). After bad pieces replacement you will be able to erase all faults memored by ESP ECU, in other words reset the ESP system and turn off the warning lamp on dashboard.

Check & replace if necessary the brake pedal switch placed above pedals on the support.
If the problem still occurs you should access the ABS & ESP ECU (Electronic Control Unit) using diagnostic equipment connected to the data link connector of the car, in order to pull out all DTC (Diagnostic Trouble Codes) memored.
Then you will be able to replace bad piece(s) and fix the problem by erasing all DTC stocked inside ABS & ESP ECU, and reset it.