Mercedes-Benz 2010 E-Class Coupe Operator's Manual page 142

Driving systems
140
Turns and bends
In turns or bends, the DISTRONIC PLUS may
not detect a preceding vehicle, or it may
detect one too soon. This may cause your
vehicle to brake late or unexpectedly.
Offset driving
A vehicle traveling in your lane but offset from
your direct line of travel may not be detected
by the DISTRONIC PLUS. There will be
insufficient distance to the preceding vehicle.
Lane changing
The DISTRONIC PLUS has not yet detected
the vehicle changing lanes. There will be
insufficient distance to the lane-changing
vehicle.
Narrow vehicles
Because of their narrow profile, the vehicles
traveling near the outer edges of the lane
have not yet been detected by the DISTRONIC
PLUS. There will be insufficient distance to
the preceding vehicles.
Obstacles and stationary vehicles
The DISTRONIC PLUS does not brake for
obstacles or stationary vehicles. If, for
example, the vehicle detected in front of you
changes lanes to bypass an obstacle or
stationary vehicle in front of it, the
DISTRONIC PLUS will not brake for the
obstacle or stationary vehicle.