LI82.10-P-054552 Service Bulletin/Repair Instructions

Lamp unit fogged/droplets forming

Topic number
Ll82.10-P-054552
Version
2
Design group
82.1 O Exterior lights
Date
02-12-2013
Validity
Model 166
Reason for change
New replacement part number
Reason for block
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 Ll82.10-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.

Important: In order for the pressure compensation membrane to be effective ii 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.
Attachments

File
Designation
Deckel mil Membrane.jpg
Protective housing - housing cover - headlamp cover
Bild 1.jpg
Positions of vent openings:

1) W166 vent opening at rear of headlamp

2) W166 vent opening at bottom of headlamp

3) X166 vent opening at rear of headlamp

4) X166 vent opening at bottom of headlamp
02-12-2013 10:33 PM
©Copyright Daimler AG
DAFARLE

Page 1/4
Symptoms

Overall vehicle I Lighting I Exterior lights I Driving lights I Main headlamps I Fogged
Parts

Part number
ES1 ES2
EPC Other

make

part
Designation
Quantity Note
A 005 989 12 71
Sealing profile
1
A 000 826 81 24
Protective cover - housing cover
2
Headlamp with large cover one per headlamp
A 000 826 89 24
Protective cover - housing cover
2
Headlamp with small cover one per headlamp
x

x

x
Work units

Op. no.
Operation text
Time
Damage

code
Note
82P01 Y1

82601 Y1
Validity

Vehicle
Engine
Transmission
M (166)
•
•
jAttachments
02-12-2013 10:33 PM

©Copyright Daimler AG
DAFARLE

Page 2/4
Deckel mil Membrane.

jpg:
02-12-2013 10:33 PM

©Copyright Daimler AG
DAFARLE

Page 3/4
Bild 1.jpg:

X166
W166
02-12-2013 10:33 PM

©Copyright Daimler AG
DAFARLE

Page 4/4

Bestseller No. 1

iCarsoft Bidirectional Scan Tool, CR Max OBD2 Diagnostic Scanner for All Vehicles, Full System 49 Resets+46 Extra Services, 40000+Active Tests,ECU Coding, Battery Registration, Oil Reset/ABS,CAN FD

WHY CHOOSE THE 2025 CR MAX -Upgrade the latest diagnostic capabilities for all vehicles after 1996: upgrade to 49+maintenance services; 46 extra specific functions; real all systems/all control modules diagnose; over 40K+ bidirectional actuation tests for diagnosing all control moduels of cars; Powerful full OBD2 Functions; built-in ECU Coding for BMW/ Audi/ VW/ RollsRoyce; Fr ee V.A.G Guide Function; Battery retistration for new battery adaptation and more. It covers all vehicle diagnostic services and some special professional vehicle maintenance servces, assists you to do home DIY vehicle maintenance or car repair as a pro technician.
NEWEST IN INNOVATION FULL OBD2 SERVICES- iCarsoft auto car diagnostic scanner compatible with CAN-FD, CR MAX can do it all-reads and clears trouble codes, ALL SYSTEM DIAGNOSIS such as engine, transmission, ABS and airbag etc. CR MAX code reader for all cars can perform I/M Readiness, Live Data, Freeze Frame, Vehicle Information, Monitor Test, On-Board Monitor, E vap System Test,O2 Sensor Test,DTC Library Lookup,etc. (Warm Tips: If you car is after 2023,please contact us for compatibility; 3. It comes with 16PIN OBD2 diagnostic adapter, please check your car diagnostic socket if it is 16pin socket, if your car is 14pin diagnostic socket please contact us for the solution.)
49 RESET+ 46 SERVICES- Performs: Oil Reset, EPB,SAS,Throttle, D-P - F, Battery, ABS, Injector, TPMS, Suspension, AC, Head Lamp, Body Stablity, Engine, Tramsmission, Airbag, Seat, Door-Win-Roof, Fuel Pump, Door, E-G- R.+21 NEWEST SERVICES( Need update scanner)-AdBlue, Clutch, Crankshaft, High Voltage Battery, Cruise Control, NO xSensor, Rain Sensor, Stop And Start, Turbocharger, Head Up Display, Radar Camera, Vehicle Setup, Cyliner Misfire Check,Speedlimitassist, ControlUnitReset,OxygenSensor, Seatbelt. Extra 46+ extra services based on car brand.(Tips: Quantity of reset/ calibration fucitons are based on car system that your vehicle model has)
REVOLUTIONARY 40000+BIDIRECTIONAL ACTIVE TESTS: Upgraded CR Max scanner equip with numberous of actuational test items for covering all available vehicle control modules, no longer only do simple light test or window test like other scanners, performs hardware modules test and software control modules test for checking car units or new updated control moduels work well or not after maintenance/ repair/ re-installation/ control system updated (Example for Benz- Roller Sun Blind test; Backup Camera test ;Self-test; EPB test; Transport Mode test;Boost Pressure Positioner test; Fuel Pump test; AND MORE!!).(Warm tip: The available test items are based on control modules your car has)
ECU CODING+ BATTERY REGISTRATION- Powerful ECU Coding service for BMW/MINI/RollsRoyce / Audi/VW/Seat/Skoda/Bentley/Bugatti/Lamborghini, Improves Engine Power Performance and Optimizes Fuel Efficiency and Match New Hardware Unit to car and Customized a comfortable Driving Modes and Fixes & Updates Original Software Bug. The battery test function for checking car battery health, perform battery reset (BMS ) for replacing a damaged or aging car battery with a new one and register new battery to car ECU

SaleBestseller No. 2

iCarsoft Auto Diagnostic Scanner POR V2.0

Scanner POR V2.0 with all obd2 services
Do the scanning for engine
Support OBDII/EOBD Ten Modes of Operation

SaleBestseller No. 3

iCarsoft Bidirectional Diagnostic Tool for Most Mercedes-Benz/Sprinter/Smart from 1996-2023 MB V3.0 2026 Version Up to 38 Service Full System OBD2 Scanner All Test AutoVIN Battery Test Free Update

【Designed for Most Mercedes-Benz, Sprinter and Smart from 1996-2023】As every car model of Benz has its-owned specific car system and ECUs, not all models are equipped with a complete vehicle ECU, which may cause the scanner to be unable to perform all listed reset services on some models, or even completely incompatible. Like For Sprinter's newer models, it support diagnostic functions only, lacking support for specialized service functions.. So please tell us the car's VIN and required service before purchase for compatibility check. You may also refer to the instructions in the eighth image of the main product photos to perform your inquiry.
【Up to 38 Reset Services】MB V3.0 2026 Version diagnostic tool performs Up to 38 maintenance services - Oil Rest , SAS, EPB, ETC, D-P-F, TPMS, ABS, Suspension, Air Conditioner, Head Lamp, Body Stability, Engine Control, Seat, Fuel Pump, Air-Filter, Engine Idle, Door, Im-mo-bilizer, Injector Coding, Transmission Control, Miscellaneous, Adblue, BMS, Cluth, Water Pump, NOxSensor, Rain/Light Sensor, Start/Stop, Radar/Camera, Cylinder Shutoff Test, Speed Limit Assist, Control Unit Reset, Oxygen Sensor, Seat Belt, Cruise Control System, Turbocharger, Crankshaft, Language Setting and etc. (Tips: Please update the software after receiving the product to obtain new service functions)
【OE-Level All System OBD2 Scanner】iCarsoft MB V3.0 (2026 Version) diagnostic scanner offers comprehensive OBDII services, allowing you to quickly scan all systems, including the Engine, ABS, SAS, SRS, TPMS, TCM, Fuel Pump System, ESP, EPB, EPS, Suspension, SCM, Adaptive Systems, and more. It supports functions such as reading and erasing codes, checking I/M readiness, viewing freeze frame data, performing O2 sensor tests, conducting on-board monitoring, testing the evap system, auto VIN retrieval, and reading both generic and specific codes, as well as DTCs and battery tests.
【Bidirectional Scan Tool】iCarsoft MB V3.0 (2026 Version) Bidirectional scanner supports activate or control a vehicle system or component, allows commanding cars’ modules and receiving info from the ECU to perform active tests on individual components, including EVAP/ABS Motor Pump/Windows/Sunroof and more, to pinpoint fault causes & resolve issues,and allows you to re-learn certain components after making repairs or replacement.
【Real Time Record & Graph View】iCarsoft MB V3.0 (2026 Version) can automatically record vehicle text history and identify vehicle information. Preserve real-time data information. View & Graph Live Data. Support Data Review and Print. Multi-language: English, German, Dutch, Spanish, French and so on. We promise to offer Lifetime updates (Lifetime free Update via PC), and confidence in products. We also provide 1 year warranty + extra lifetime hardware free repair if you need it in the future. We prioritize user experience & strive to meet your expectations. Please do feel free to reach out to us if you have any question or problem about the usage, our tech team will service you in time.

This product presentation was made with AAWP plugin.

Last update on 2026-05-11 / Affiliate links / Images from Amazon Product Advertising API

Buffer Email Facebook Flipboard Hacker News LinkedIn Messenger Mix Pinterest Print Reddit SMS Telegram Tumblr X VK WhatsApp Line Xing Threads Bluesky Copy Mastodon Nextdoor