2020 Mercedes Benz Truck ML 350 Technical Service Bulletin # LI82-35_P-048244 Date: 091028

2020 Mercedes Benz Truck ML 350 Technical Service Bulletin # LI82-35_P-048244 Date: 091028

Wipers/Washers - 'Low Washer Fluid Level' Warning

WASHER FLUID INDICATOR ON INSTRUMENT CLUSTER INCORRECT

Topic number LI82.35-P-048244

Version 1

Design group 82.35 Windshield washing system

Date 10-28-2009

Validity Model 169 with code U58

Model 245 with code U58,

Model 204, 216, 212

Model GLK 204, 164, 251, 221

Reason for change Applicable models and remedy updated / Supersedes

DTB P-B-82.35/587 and T-B-82.35/588

Reason for block

2020 Mercedes Benz Truck ML 350 4MATIC (164.186) V6-3.5L (272.967) Page 252

Complaint:

Washer fluid indicator is not correct.

Indicator on instrument cluster shows that reservoir is empty although the reservoir contains sufficient windshield washer fluid.

Cause:

The electrical conductivity of the fluid in the washer fluid reservoir is not sufficient due to:

a) The use of distilled or deionized water,

b) Tap water content of mixing ratio is too low or

c) Proportion of winter washer fluid concentrate is too high (antifreeze protection approx.100%)

The electrical circuit cannot be closed by the 2-pin sensor and the message "Washer fluid reservoir empty" appears in the display of the instrument

cluster.

Remedy:

Fill the reservoir with washer concentrate and tap water at the recommended mixing ratio (see owner's manual).

Note:

It is assumed that the connectors to the washer fluid level sensor are plugged in and the lines have no function impairments.

Replacement of the SAM control unit or the current washer fluid level sensor does not rectify the issue.

Symptoms

Parts

2020 Mercedes Benz Truck ML 350 4MATIC (164.186) V6-3.5L (272.967) Page 253