Mercedes-Benz Relay / Fuse Box 1665402150
OEM Part #: 166-540-21-50 (1665402150)
This page covers one exact OEM part number. Every unit we stocked has sold.
We may be able to get another
Used OEM parts are one-of-a-kind. We sometimes get another when we dismantle a matching vehicle, but we can’t say when — browse what’s in stock now:
Other Fuse / Relay Box that may fit your vehicle
- Genuine OEM — real photos
- 30-day returns on eligible parts
- eBay Top Rated · 100,000+ positive ratings
- Ships from our own indoor warehouse
Enhance the reliability of your Mercedes-Benz with this authentic OEM RELAY/FUSE BOX. Designed to distribute electrical power to various systems, this component is essential for ensuring optimal performance and safety. It effectively addresses issues like intermittent electrical failures or complete malfunctions commonly caused by wear over time. This relay/fuse box is compatible with a variety of models including the GLE350, GLE550e, ML350, and ML63 AMG from 2012 to 2019. OEM Part Numbers include 1665409315, 1665402050, and 1665402150. This factory-original part is sourced directly from salvage vehicles, guaranteeing true OEM quality for your repair needs.
Specifications
| Fits Vehicle Model | GL350, GL450, GL550, GL63 AMG, GLE300d, GLE350, GLE400, GLE43 AMG, GLE450 AMG, GLE550e, GLE63 AMG, GLE63 AMG S, GLS350d, GLS450, GLS550, GLS63 AMG, ML250, ML350, ML400, ML550, ML63 AMG |
| Fits Vehicle Make | Mercedes-Benz |
| OEM Part No | 166-540-21-50 (1665402150) |
| Compatible OEM Part No | 166-540-93-15, 166-540-20-50, 166-540-21-50, 166-540-29-50, 166-540-36-12 |
| Category | Relay / Fuse |
Compatible Vehicles
Fits 72 vehicle configurations across 1 make, 2012-2019.
Check your specific vehicle before ordering.
This list shows year, make, and model. Some years have multiple trims or
engines that use different parts, and individual listings may have
additional fitment notes (e.g. “with sunroof only”). Review
the full variant list below, or
message us with your VIN
and we’ll confirm the match.
View all 72 vehicle configurations — 50 with fitment notes
| Year | Make | Model | Trim | Engine | Note |
|---|---|---|---|---|---|
| 2012 | Mercedes-Benz | ML350 | SUV | 3.5L V6 | under seat #1 |
| 2012 | Mercedes-Benz | ML350 | SUV | 3.0L V6 Diesel Turbo | under seat #1 |
| 2012 | Mercedes-Benz | ML550 | SUV | 4.7L V8 Turbo | under seat #1 |
| 2012 | Mercedes-Benz | ML63 AMG | SUV | 5.5L V8 Turbo | under seat #1 |
| 2013 | Mercedes-Benz | GL350 | SUV | 3.0L V6 Diesel Turbo | under seat #1 |
| 2013 | Mercedes-Benz | GL450 | SUV | 4.7L V8 Turbo | under seat #1 |
| 2013 | Mercedes-Benz | GL550 | SUV | 4.7L V8 Turbo | under seat #1 |
| 2013 | Mercedes-Benz | GL63 AMG | SUV | 5.5L V8 Turbo | under seat #1 |
| 2013 | Mercedes-Benz | ML350 | SUV | 3.5L V6 | under seat #1 |
| 2013 | Mercedes-Benz | ML350 | SUV | 3.0L V6 Diesel Turbo | under seat #1 |
| 2013 | Mercedes-Benz | ML550 | SUV | 4.7L V8 Turbo | under seat #1 |
| 2013 | Mercedes-Benz | ML63 AMG | SUV | 5.5L V8 Turbo | under seat #1 |
| 2014 | Mercedes-Benz | GL350 | SUV | 3.0L V6 Diesel Turbo | under seat #1 |
| 2014 | Mercedes-Benz | GL450 | SUV | 4.7L V8 Turbo | under seat #1 |
| 2014 | Mercedes-Benz | GL550 | SUV | 4.7L V8 Turbo | under seat #1 |
| 2014 | Mercedes-Benz | GL63 AMG | SUV | 5.5L V8 Turbo | under seat #1 |
| 2014 | Mercedes-Benz | ML350 | SUV | 3.5L V6 | under seat #1 |
| 2014 | Mercedes-Benz | ML350 | SUV | 3.0L V6 Diesel Turbo | under seat #1 |
| 2014 | Mercedes-Benz | ML550 | SUV | 4.7L V8 Turbo | under seat #1 |
| 2014 | Mercedes-Benz | ML63 AMG | SUV | 5.5L V8 Turbo | under seat #1 |
| 2015 | Mercedes-Benz | GL350 | SUV | 3.0L V6 Diesel Turbo | under seat #1 |
| 2015 | Mercedes-Benz | GL450 | SUV | 3.0L V6 Turbo | under seat #1 |
| 2015 | Mercedes-Benz | GL550 | SUV | 4.7L V8 Turbo | under seat #1 |
| 2015 | Mercedes-Benz | GL63 AMG | SUV | 5.5L V8 Turbo | under seat #1 |
| 2015 | Mercedes-Benz | ML250 | SUV | 2.1L l4 Diesel Turbo | under seat #1 |
| 2015 | Mercedes-Benz | ML350 | SUV | 3.5L V6 | under seat #1 |
| 2015 | Mercedes-Benz | ML400 | SUV | 3.0L V6 Turbo | under seat #1 |
| 2015 | Mercedes-Benz | ML63 AMG | SUV | 5.5L V8 Turbo | under seat #1 |
| 2016 | Mercedes-Benz | GL350 | SUV | 3.0L V6 Diesel Turbo | under seat #1 |
| 2016 | Mercedes-Benz | GL450 | SUV | 3.0L V6 Turbo | under seat #1 |
| 2016 | Mercedes-Benz | GL550 | SUV | 4.7L V8 Turbo | under seat #1 |
| 2016 | Mercedes-Benz | GL63 AMG | SUV | 5.5L V8 Turbo | under seat #1 |
| 2016 | Mercedes-Benz | GLE300d | SUV | 2.1L l4 Diesel Turbo | under seat #1 |
| 2016 | Mercedes-Benz | GLE350 | SUV | 3.5L V6 | under seat #1 |
| 2016 | Mercedes-Benz | GLE400 | SUV | 3.0L V6 Turbo | |
| 2016 | Mercedes-Benz | GLE63 AMG | SUV | 5.5L V8 Turbo | |
| 2016 | Mercedes-Benz | GLE63 AMG S | SUV | 5.5L V8 Turbo | |
| 2017 | Mercedes-Benz | GLE300d | SUV | 2.1L l4 Diesel Turbo | under seat #1 |
| 2017 | Mercedes-Benz | GLE350 | SUV | 3.5L V6 | under seat #1 |
| 2017 | Mercedes-Benz | GLE400 | SUV | 3.0L V6 Turbo | under seat #1 |
| 2017 | Mercedes-Benz | GLE43 AMG | SUV | 3.0L V6 Turbo | |
| 2017 | Mercedes-Benz | GLE63 AMG | SUV | 5.5L V8 Turbo | |
| 2017 | Mercedes-Benz | GLE63 AMG S | SUV | 5.5L V8 Turbo | |
| 2017 | Mercedes-Benz | GLS350d | SUV | 3.0L V6 Diesel Turbo | under seat #1 |
| 2017 | Mercedes-Benz | GLS450 | SUV | 3.0L V6 Turbo | under seat #1 |
| 2017 | Mercedes-Benz | GLS550 | SUV | 4.7L V8 Turbo | under seat #1 |
| 2017 | Mercedes-Benz | GLS63 AMG | SUV | 5.5L V8 Turbo | |
| 2018 | Mercedes-Benz | GLE350 | SUV | 3.5L V6 | under seat #1 |
| 2018 | Mercedes-Benz | GLE43 AMG | SUV | 3.0L V6 Turbo | |
| 2018 | Mercedes-Benz | GLE63 AMG | SUV | 5.5L V8 Turbo | |
| 2018 | Mercedes-Benz | GLE63 AMG S | SUV | 5.5L V8 Turbo | |
| 2018 | Mercedes-Benz | GLS450 | SUV | 3.0L V6 Turbo | under seat #1 |
| 2018 | Mercedes-Benz | GLS550 | SUV | 4.7L V8 Turbo | under seat #1 |
| 2018 | Mercedes-Benz | GLS63 AMG | SUV | 5.5L V8 Turbo | |
| 2019 | Mercedes-Benz | GLE400 | SUV | 3.0L V6 Turbo | under seat #1 |
| 2019 | Mercedes-Benz | GLE43 AMG | SUV | 3.0L V6 Turbo | |
| 2019 | Mercedes-Benz | GLE63 AMG | SUV | 5.5L V8 Turbo | |
| 2019 | Mercedes-Benz | GLE63 AMG S | SUV | 5.5L V8 Turbo | |
| 2019 | Mercedes-Benz | GLS450 | SUV | 3.0L V6 Turbo | under seat #1 |
| 2019 | Mercedes-Benz | GLS550 | SUV | 4.7L V8 Turbo | under seat #1 |
| 2019 | Mercedes-Benz | GLS63 AMG | SUV | 5.5L V8 Turbo | |
| 2016 | Mercedes-Benz | GLE550e | SUV | 3.0L V6 Turbo | under seat #1 |
| 2016 | Mercedes-Benz | GLE63 AMG S | SUV Coupe | 5.5L V8 Turbo | |
| 2017 | Mercedes-Benz | GLE43 AMG | SUV Coupe | 3.0L V6 Turbo | |
| 2017 | Mercedes-Benz | GLE550e | SUV | 3.0L V6 Turbo | under seat #1 |
| 2017 | Mercedes-Benz | GLE63 AMG S | SUV Coupe | 5.5L V8 Turbo | |
| 2018 | Mercedes-Benz | GLE43 AMG | SUV Coupe | 3.0L V6 Turbo | |
| 2018 | Mercedes-Benz | GLE550e | SUV | 3.0L V6 Turbo | under seat #1 |
| 2018 | Mercedes-Benz | GLE63 AMG S | SUV Coupe | 5.5L V8 Turbo | |
| 2019 | Mercedes-Benz | GLE43 AMG | SUV Coupe | 3.0L V6 Turbo | |
| 2019 | Mercedes-Benz | GLE63 AMG S | SUV Coupe | 5.5L V8 Turbo | |
| 2016 | Mercedes-Benz | GLE450 AMG | SUV Coupe | 3.0L V6 Turbo | under seat #1 |