Mercedes-Benz Mercedes Benz OEM Parts Mercedes Benz OE Replacement Parts
Technical Service Bulletin # LI82-10_P-0545522 Date: 130212
Lighting - Headlamp Unit Fogged/Droplets Forming Lamp unit fogged/droplets forming
Topic number L182.10-P-054552
Version 2
Design group 82.10 Exterior lights
Date 02-12-2013
Validity Model 166
Reason for change New replacement part number
Complaint: Lamp unit fogged or droplets forming.
Cause: Due to the vent openings, the lamp unit is an "open system".
This means that acidic gases, moisture, dirt and exhaust gases can penetrate it.
This can result in deposits on the diffuser and lens.
Remedy: Check housing cover of lamp unit for natural fogging or dew as per L182.10-P-050139.
1. If a reduction in the degree of fogging is visible, the pressure compensation membrane can be inserted after complete evaporation of the dew.
2. If no reduction in the degree of fogging is visible, the lamp unit is defective and must be replaced.
However, the cover with the pressure compensation membrane should also be attached in this case.
Note:
Residual fogging is possible due to the laws of physics and is OK.
Fogging does not impair the functionality or the service life of the lamp unit.
Pressure compensation membranes should always be used on both lamp units.
Attach housing cover with pressure compensation membrane:
1. Remove lamp unit
2. Remove all vent opening grommets.
3. Seal vent openings with sealing profile.
2013 Mercedes Benz Truck ML 63 AMG (166.074) V8-5.5L Turbo (157.980) Page 39
Important: In order for the pressure compensation membrane to be effective it is vital that all the openings are carefully sealed! Positions of vent openings, see Figure 1.
4. Insert housing cover with pressure compensation membrane.
5. Install lamp unit.
2013 Mercedes Benz Truck ML 63 AMG (166.074) V8-5.5L Turbo (157.980) Page 40
Attachments
Symptoms
2013 Mercedes Benz Truck ML 63 AMG (166.074) V8-5.5L Turbo (157.980) Page 41
Parts
Work Units
Technical Service Bulletin # LI82-10_P-0545522 Date: 130212
Lighting - Headlamp Unit Fogged/Droplets Forming Lamp unit fogged/droplets forming
Topic number L182.10-P-054552
Version 2
Design group 82.10 Exterior lights
Date 02-12-2013
Validity Model 166
Reason for change New replacement part number
Complaint: Lamp unit fogged or droplets forming.
Cause: Due to the vent openings, the lamp unit is an "open system".
This means that acidic gases, moisture, dirt and exhaust gases can penetrate it.
This can result in deposits on the diffuser and lens.
Remedy: Check housing cover of lamp unit for natural fogging or dew as per L182.10-P-050139.
1. If a reduction in the degree of fogging is visible, the pressure compensation membrane can be inserted after complete evaporation of the dew.
2. If no reduction in the degree of fogging is visible, the lamp unit is defective and must be replaced.
However, the cover with the pressure compensation membrane should also be attached in this case.
Note:
Residual fogging is possible due to the laws of physics and is OK.
Fogging does not impair the functionality or the service life of the lamp unit.
Pressure compensation membranes should always be used on both lamp units.
Attach housing cover with pressure compensation membrane:
1. Remove lamp unit
2. Remove all vent opening grommets.
3. Seal vent openings with sealing profile.
2013 Mercedes Benz Truck ML 63 AMG (166.074) V8-5.5L Turbo (157.980) Page 39
Important: In order for the pressure compensation membrane to be effective it is vital that all the openings are carefully sealed! Positions of vent openings, see Figure 1.
4. Insert housing cover with pressure compensation membrane.
5. Install lamp unit.
2013 Mercedes Benz Truck ML 63 AMG (166.074) V8-5.5L Turbo (157.980) Page 40
Attachments
Symptoms
2013 Mercedes Benz Truck ML 63 AMG (166.074) V8-5.5L Turbo (157.980) Page 41
Parts
Work Units
