Led Display In Climate System Control Module Difficult To Read (LI83.40-P-045002)

Publication date: 2009-01-16
Reference number: LI83.40-P-045002
Supersedes refnos: 83.40/96

LED DISPLAY IN CLIMATE SYSTEM CONTROL MODULE DIFFICULT TO READ

TECHNICAL SERVICE BULLETIN

Reference Number(s): LI83.40-P-045002 Version 1 (P-B-83.40/96, May 4, 2007), Date of Issue: January 16, 2009

Mercedes-Benz:	All Model 211 Vehicles
Design Group:	83.40 Air conditioning (automatic)
Reason For Change:

COMPLAINT

LED display in the climate system control module appears too dim or difficult to read.

CAUSE

Due to certain light conditions and the effect they have on the rain/light sensor (B38/2).

REMEDY

Do not replace any parts for this condition.

Bright sunlight from behind the vehicle, the sensor switches to "Night".
A high proportion of diffused light, the sensor switches to "Night".
Rapid change in light levels, i.e. driving in and out of a tunnel, the light sensor takes time to switch between modes.

NOTE: The setting of the dimmer function on the instrument cluster also influences the display of the climate control push button unit when the "Night" setting is active. The display may be more difficult to read in the daytime with certain lighting conditions described above when in "Night" mode.

SYMPTOMS

Air conditioning display error / Body / Air conditioning / Air conditioning /