2014 Mercedes-Benz GL450 service bulletins & manufacturer communications
77 manufacturer communications are on file with NHTSA for the 2014 Mercedes-Benz GL450. TSBs are repair guidance for dealers — they are not recalls, and repairs are not automatically free.
Technical service bulletin 74Warranty extension 2Service campaign 1
- Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end). The noise is heard once in each instance when changing direction of trave…LI35.30-P-058566 · Technical service bulletin · Power Train · issued Jul 14, 2026
- Complaint Creaking noise, in irregular sequence when driving slowly in combination with slight steering movements and/or Creaking/crackling noises from the area of the wheel bearin…LI33.20-P-078406 · Technical service bulletin · Suspension · issued Jul 8, 2026
- Complaint Creaking noise, in irregular sequence when driving slowly in combination with slight steering movements and/or Creaking/crackling noises from the area of the wheel bearin…LI33.20-P-078406 · Technical service bulletin · Suspension · issued Jul 7, 2026
- Complaint After successful commissioning of the HERMES control unit (N112/9) with XENTRY Diagnosis DVD 03/2026, the message "SOS - service not activated" appears on the instrument …LI82.85-P-080507 · Technical service bulletin · Electrical System · issued May 26, 2026
- Complaint The customer requests deactivation of the N112/9 HERMES communication module Note: Deactivation of the HERMES control unit (N112/9) is not supported for gray-market vehic…LI82.85-P-080559 · Technical service bulletin · Electrical System · issued May 26, 2026
- Complaint There are several types of complaint about noises or poor windshield wiper wiping performance: A: Wiper blades squeaking, chattering, shuddering B: The windshield is not …LI82.30-P-059239 · Technical service bulletin · Visibility/wiper · issued May 19, 2026
- Complaint Creaking noise, in irregular sequence when driving slowly in combination with slight steering movements and/or Creaking/crackling noises from the area of the wheel bearin…LI33.20-P-078406 · Technical service bulletin · Suspension · issued May 12, 2026
- Complaint Headlamp, front fog lamp leaky or fogged. Cause Fogging of the headlamps is a natural phenomenon, which can occur under certain climatic conditions. It does not lead to a…LI82.10-P-078301 · Technical service bulletin · Exterior Lighting · issued Apr 16, 2026
- Complaint Headlamp, front fog lamp leaky or fogged Cause Fogging of the headlamps is a natural phenomenon, which can occur under certain climatic conditions. It does not lead to an…LI82.10-P-078301 · Technical service bulletin · Exterior Lighting · issued Mar 9, 2026
- Complaint Headlamps leaking or fogged Cause The fogging of the headlamp is a natural phenomenon which can occur under certain climatic conditions. In contrast to a leaky headlamp, …LI82.10-P-078307 · Technical service bulletin · Exterior Lighting · issued Feb 25, 2026
- Complaint Headlamp, front fog lamp leaky or fogged Cause Fogging of the headlamps is a natural phenomenon, which can occur under certain climatic conditions. It does not lead to an…LI82.10-P-078301 · Technical service bulletin · Exterior Lighting · issued Feb 24, 2026
- Complaint Headlamps leaking or fogged Cause The fogging of the headlamp is a natural phenomenon which can occur under certain climatic conditions. In contrast to a leaky headlamp, …LI82.10-P-078896 · Technical service bulletin · Exterior Lighting · issued Feb 24, 2026
- Complaint After a software update of HERMES communication module N112/9 has been performed on a gray import vehicle, the message "SOS - Service not activated" is displayed in the i…LI82.85-P-079271 · Technical service bulletin · Electrical System · issued May 22, 2025
- Complaint Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end). The clunk is heard once when changing from forward to reverse (…LI33.30-P-056665 · Technical service bulletin · Power Train · issued May 21, 2025
- Complaint Headlamps leaking or fogged Cause The fogging of the headlamp is a natural phenomenon which can occur under certain climatic conditions. In contrast to a leaky headlamp, …LI82.10-P-078896 · Technical service bulletin · Exterior Lighting · issued Apr 28, 2025
- Complaint Headlamp, front fog lamp leaky or fogged Cause Fogging of the headlamps is a natural phenomenon, which can occur under certain climatic conditions. It does not lead to an…LI82.10-P-078301 · Technical service bulletin · Exterior Lighting · issued Apr 28, 2025
- Complaint A popup is seen on the HU with the message "data connection temporarily not available". Potentially affected functionalities in NTG4.5, NTG5 1.Weather 2.Local Search 3.IP…LI82.85-P-079087 · Technical service bulletin · Electrical System · issued Apr 21, 2025
- Complaint During a phone call, the called party has difficulty understanding/cannot understand the driver, or interference/background noises are audible to the called party during …LI82.70-P-077433 · Technical service bulletin · Electrical System · issued Mar 5, 2025
- Complaint Creaking noise, in irregular sequence when driving slowly in combination with slight steering movements. Sound file attached for comparison. NOTE: Steering functionality …LI33.20-P-078406 · Technical service bulletin · Suspension · issued Jan 28, 2025
- Complaint Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end). The clunk is heard once when changing from forward to reverse (…LI33.30-P-056665 · Technical service bulletin · Power Train · issued Jan 16, 2025
- Complaint Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end). The noise is heard once in each instance when changing directio…LI35.30-P-058566 · Technical service bulletin · Power Train · issued Jan 15, 2025
- Complaint The flap of the reversing camera opens and closes by itself during forward travel several times during the trip. No camera image is displayed in the head unit. The revers…LI54.65-P-066284 · Technical service bulletin · Electrical System · issued Jan 15, 2025
- Complaint The flap of the reversing camera opens and closes by itself during forward travel. This happens several times during the trip. The customer notices the sound of opening a…LI54.65-P-066284 · Technical service bulletin · Electrical System · issued Nov 25, 2024
- Complaint Creaking noise, in irregular sequence when driving slowly in combination with slight steering movements. Sound file attached for comparison. NOTE: Steering functionality …LI33.20-P-078406 · Technical service bulletin · Wheels · issued Nov 21, 2024
- Complaint Transmission control unit Y3/8n4 (fully integrated transmission control unit (VGS)) not listed in quick test and/or no communication possible with VGS. Cause Transmission…LI27.19-P-072588 · Technical service bulletin · Power Train · issued Nov 20, 2024
- Complaint After a control unit replacement of "N112/9 - control unit for telematics services (HERMES)" or the "N112/2 - control unit for telematics services (RAMSES)", the Digital …LI82.85-P-078473 · Technical service bulletin · Electrical System · issued Nov 20, 2024
- Complaint Washer fluid system leaks Cause Various possible causes: 1. Washer fluid reservoir itself. 2. Seal on washer fluid pump/washer fluid reservoir. 3. Washer fluid pump. 3.1.…LI82.35-P-078467 · Technical service bulletin · Structure · issued Oct 23, 2024
- Complaint After a control unit replacement of "N112/9 - control unit for telematics services (HERMES)" or the "N112/2 - control unit for telematics services (RAMSES)", the Digital …LI82.85-P-078473 · Technical service bulletin · Electrical System · issued Oct 3, 2024
- Complaint During a phone call, the called party has difficulty understanding/cannot understand the driver, or interference/background noises are audible to the called party during …LI82.70-P-077433 · Technical service bulletin · Electrical System · issued Sep 28, 2024
- Complaint Creaking noise, in irregular sequence when driving slowly in combination with slight steering movements. Sound file attached for comparison. NOTE: Steering functionality …LI33.20-P-078406 · Technical service bulletin · Suspension · issued Sep 26, 2024
- Complaint Headlamps leaking or fogged Cause The fogging of the headlamp is a natural phenomenon which can occur under certain climatic conditions. In contrast to a leaky headlamp, …LI82.10-P-078307 · Technical service bulletin · Exterior Lighting · issued Sep 21, 2024
- Complaint Headlamp or front fog lamp leaky or fogged Cause Fogging of the headlamps is a natural phenomenon, which can occur under certain climatic conditions. It does not lead to …LI82.10-P-078301 · Technical service bulletin · Exterior Lighting · issued Sep 10, 2024
- Complaint Headlamps fogged or droplets forming. Cause Due to the housing cover with pressure compensation diaphragm, the headlamps are a "closed system". This means that the headla…LI82.10-P-078304 · Technical service bulletin · Exterior Lighting · issued Sep 9, 2024
- Mercedes-Benz AG ("MBAG"), the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year (“MY”) C-Class, E-Class, S-Class, G-Class, CL, CLS, ML, GL, GLE, GL…NCU - 2022080005 · Service campaign · Electrical System · issued Aug 10, 2024
- In our continuing efforts to ensure the proper performance and quality of your vehicle, we are writing to inform you that on certain Model Year 2011-2018 C-Class, E-Class, S-Class,…CL - 2022080005 · Technical service bulletin · Electrical System · issued Aug 9, 2024
- Complaint Rear lamps fogged up/not leaktight. Cause Fogging of the rear lamps is a natural phenomenon, which can occur under certain climatic conditions. This does not lead to any …LI82.10-P-078069 · Technical service bulletin · Exterior Lighting · issued Jul 23, 2024
- Crease formation on genuine leather seat covers in vehicles with low mileage â ¢ Objects left on the seats for extended periods of time (pressure marks). â ¢ Objects wedged b…LI91.18-P-077075 · Technical service bulletin · Seats · issued Dec 4, 2023
- In our continuing efforts to assure the proper performance of Mercedes-Benz products and to enhance the satisfaction of our customers, Mercedes-Benz USA ("MBUSA") is extending the …CL-Exhaust Valve Assembly · Technical service bulletin · Engine · issued Sep 6, 2023
- This NCU replaces the prior NCU issued on March 10, 2023, and contains clarification on reimbursement timeline and removal of damage codes related to intake valves/guide. In our co…EW-Exhaust Valve Assembly · Warranty extension · Engine · issued Sep 6, 2023
- Complaint The garage door hand transmitter cannot be initialized with the integrated garage door opener in the inside rearview mirror. Cause 1. The integrated garage door opener (G…LI68.05-P-060306 · Technical service bulletin · Electrical System · issued Jan 27, 2022
- Complaint The range of the integrated garage door opener (GTO) is too short. Cause 1. Vehicles equipped with infrared windows and/or a heated windshield may suffer from complaints …LI68.05-P-060307 · Technical service bulletin · Electrical System · issued Jan 9, 2022
- Fuel filler flap opens slowly/switch flashes/tank is bleeding instrument cluster warningLI8860P073470 · Technical service bulletin · Fuel System, Gasoline · issued Aug 11, 2021
- Mercedes-Benz AG (?MBAG?), the manufacturer of Mercedes-Benz, has determined that on certain Model Year (?MY?) 2013-2017 B-Class, C-Class, CLA-Class, CLS-Class, E-Class, G-Class, G…Launch NCU - 202 · Technical service bulletin · Equipment · issued Jan 7, 2021
- Mercedes-Benz USA, LLC (?MBUSA?) has entered into an agreement with the United States Department of Justice (DOJ), the Environmental Protection Agency (EPA), the California Air Res…NCU-2020070018 · Technical service bulletin · Equipment · issued Nov 12, 2020
- Mercedes-Benz USA, LLC (?MBUSA?) has entered into an agreement with the United States Department of Justice (DOJ), the Environmental Protection Agency (EPA), the California Air Res…NCU-2020110011 · Technical service bulletin · Engine and Engine Cooling · issued Nov 11, 2020
- This NCU replaces the prior NCUs issued on May 18, June 25, 2020 and October 1, 2020 and contains important workshop instructions on how the HVAC Service Warranty repair must be ca…EW - HVAC Service · Warranty extension · Visibility/wiper · issued Oct 29, 2020
- To enhance the satisfaction of our customers, avoid further costs of litigation and return focus to its core businesses, Mercedes-Benz USA, LLC (MBUSA) has entered into a settlemen…NCU - HVAC Warra · Technical service bulletin · Equipment · issued May 21, 2020
- Retrofitted front door exit lamps with logo projection flickerLI82.20-P-070189 · Technical service bulletin · Structure · issued Jan 14, 2020
- Ticking or pulsing noise from high-pressure pump and/or fuel injectors.LI0702P0547173 · Technical service bulletin · Engine and Engine Cooling · issued Nov 14, 2016
- High beams not functioning when first operated.LI8210P0652091 · Technical service bulletin · Exterior Lighting · issued Nov 10, 2016
- Traffic information service and posibly the voice control, nonfunctional after navigation software update.LI8285P0647651 · Technical service bulletin · Equipment · issued Aug 25, 2016
- Engine fan runs continuously, a/c inoperable or, engine light illuminates sporadically.LI8330P0646722 · Technical service bulletin · Electrical System · issued Aug 17, 2016
- Engine fan runs continuously, a/c inoperable or, engine light illuminates sporadically.LI8330P0646721 · Technical service bulletin · Electrical System · issued Aug 11, 2016
- Headlamp lights up sporadicallyLI82.10-P-064172 · Technical service bulletin · Exterior Lighting · issued May 31, 2016
- Xentry (mercedes): stored in engine control unit (ecu) is fault to exhaust back pressure sensor causing engine to be in limp home mode and diagnosis warning lamp activated. Model 1…LI07-04-P061777 · Technical service bulletin · Engine and Engine Cooling · issued Jul 6, 2015
- Xentry (mercedes): due to software of audio20 control unit and version of garmin sd card, audio switches off after starting and audio not available, has vertical lines, displays fl…LI82-85P060258 · Technical service bulletin · Equipment · issued Jun 15, 2015
- Xentry (daimler): stored in engine control unit are faults relating to throttle valve actuator and/or oxygen sensor due to occasional transition resistance at contacts, causing eng…LI54-18-P-057927 · Technical service bulletin · Engine · issued Jun 4, 2015
- Summary to be provided on a future date.S-B-80.57/62A · Technical service bulletin · Electrical System · issued Oct 25, 2014
- 2nd seat row Power Easy Entry function impairment of backrest foldingLI91.22-P-059988 · Technical service bulletin · Seats · issued Oct 14, 2014
- Summary to be provided on a future date.S-B-80.57/62 · Technical service bulletin · Equipment · issued Sep 17, 2014
- Xentry (mercedes): after engine has started, several issues occurs, an acoustic warning sounds is heard, the instrument cluster displays warning message power steering malfunction,…LI46-35P059241 · Technical service bulletin · Steering · issued Jun 20, 2014
- Delayed 2-3 UpshiftLI27.20-P-059067 · Technical service bulletin · Power Train · issued May 16, 2014
- Summary to be provided on a future date.1-A · Technical service bulletin · Equipment · issued Apr 1, 2014
- Minor leaks at the oil duct of the left or right cylinder head of engines 157, 276 and 278. 1. Left cylinder head: Oil passage plug hole on left beside mechanical vacuum pump. 2. R…LI01.30-P-058630 · Technical service bulletin · Electrical System · issued Mar 21, 2014
- Collision Prevention Assist (CPA) may warn for no obvious reason (optical and/or acoustic warning message).LI30.30-P-055823 · Technical service bulletin · Lane Departure · issued Feb 11, 2014
- This Customer 1 Action has been initiated because certain mbrace subscribers were recently contacted by mbrace informing them that they need to have an i-button call performed to e…C1A140101 · Technical service bulletin · Equipment · issued Feb 11, 2014
- Message in instrument cluster "DISTRONIC PLUSCurrently Unavailable - See Owner's Manual"GI88.40-P-057430 · Technical service bulletin · Equipment · issued Feb 3, 2014
- This Service Campaign has been initiated because Daimler AG (DAG), the manufacturer of Mercedes-Benz vehicles, has determined that the mbrace software does not correspond to curren…S-SC- 2013090008 · Technical service bulletin · Electrical System · issued Feb 1, 2014
- Xentry (mercedes): control units installed, under driver/front passenger seat, has water entering tray, caused by condensation hose of a/c housing being either dislocated, pinched,…LI83-00P-052510 · Technical service bulletin · Equipment · issued Jan 6, 2014
- "SOS mbrace service not activated".LI8295P054406 · Technical service bulletin · Equipment · issued Aug 28, 2013
- Software update of COMAND Online control unit.LI8270P056963 · Technical service bulletin · Electrical System · issued Aug 21, 2013
- "Metadata loss- Please reimport all media data".LI8285P053927 · Technical service bulletin · Electrical System · issued Aug 5, 2013
- Mobile phone cotacts are not transferred completely.LI8270P055572 · Technical service bulletin · Electrical System · issued Aug 5, 2013
- FC 2783 (Friction power of torque converter lockup clutch is too high) or FC 0741 (Actuation of torque converter lockup clutch not possible) stored in transmission control unit. On…LI27.20-P-055758 · Technical service bulletin · Power Train · issued Jul 30, 2013
- Customer experiences low battery conditions, resulting in jump starts, and eventually requiring battery replacement.LI82.95-P-056655 · Technical service bulletin · Electrical System · issued Jul 12, 2013
- The COMAND unit does not start or the COMAND display remains dark. The COMAND unit cannot be operated. Note: The problem disappears after a lengthy idle period (>6h) or after inter…LI82.85-P-055695 · Technical service bulletin · Electrical System · issued Jul 8, 2013
- Outside mirror fogged.LI8870P056690 · Technical service bulletin · Visibility · issued Jul 3, 2013