mercedesbenz Workshop Repair Guides

Mercedes Benz Workshop Service and Repair Manuals

Lighting - Exterior Lights Intermittently Stay ON|Page 876 > < Computer/Controls - SAM Control Unit Diagnosis Procedure
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Power Distribution Module: All Technical Service Bulletins
Lighting - Exterior Lights Intermittently Stay ON

EXTERIOR LIGHTS CONSTANTLY ON

Topic number

LI54.21-P-048648

Version

2

Design group

54.21 Control modules/modules

Date

01-06-2010

Validity

Model series 204 up to production date 30.11.2009 (up to VIN ...F451959, ...A360004,...R107828)

Reason for change

VINs added

Reason for block

Complaint:

Exterior lights constantly on sometimes. Possible components:

- Low beams

- Front fog lamp

- High beams

The washer fluid pump and the headlamp cleaning system are also potentially affected.

The above functions cannot be deactivated. This results in discharge of the battery.

Cause:

Hardware fault in driver-side SAM

Remedy:

Replace the Front SAM as per EPC.

Symptoms

Work units

Lighting - Exterior Lights Intermittently Stay ON|Page 876 > < Computer/Controls - SAM Control Unit Diagnosis Procedure