Parking Brake See Owners Manual; A Diagnostic Case Study (Mercedes-Benz S-Class W221) When the “Parking Brake See Owner’s Manual” warning appears on your Mercedes-Benz S-Class W221, it can be confusing and concerning.This message indicates a malfunction in the electronic parking ...
Quick Summary “Active Brake Assist Functions Limited — See Owner’s Manual” means your Mercedes’s automatic emergency braking system has detected a fault and cannot guarantee full collision-avoidance intervention. Your standard brakes are unaffected. The most common causes are a dirty ...