The Mercedes Benz active blind spot assist inoperative error is a common problem across many models with blind spot assist as option and can appear for a range of reasons - but in some cases, can be easily fixed and avoided. Read on for more information about how to diagnose this warning error and what can be done to fix it.
What is active blind spot assist?
The Mercedes Benz blind spot assist feature uses radar sensors to detect other objects or vehicles alongside and behind your car. The feature aims to alert drivers when it is and isn’t safe to change lanes, by assisting them in detecting obstructions in blind spot areas.
What causes a problem with Mercedes Benz blind spot assist?
You’ll often be alerted to an issue with blind spot assist through a dashboard message, reading ‘blind spot assist has been deactivated’. This issue isn’t uncommon and can be triggered for a variety of reasons, such as:
- Driving in bad weather conditions, such as heavy rain, snow or fog
- Dirty or obstructed sensors
- Driving in heavy traffic for an extended period
- Driving close to walls and barriers
- Water in sensors
- Fuse failure
- Issues with a steering angle sensor
- Driving next to a truck for an extended period of time
- Interference from other equipment
- Faulty blind spot assist radar sensors
How to fix issues with Mercedes Benz blind spot assist?
Firstly, you should drive to an open area free of obstruction and restart your car. This should resolve the issue if the error was caused by driving in heavy traffic, close to barriers and walls, or being exposed to interference, such as radio stations or other waves, which could interference these radars.
The second step is to check blown fuses to ensure these are in working order if both of these options are negative go to the third one below, which is final and the most issue causing blind sport assist inoperative malfunction.
If the problem persists, turn off your car and wipe the sensors clean - this should correct the issue if the error was caused by false readings due to dirt. Restart your car and check whether or not the error message appears.
While cleaning sensors check for any moisture or mold inside the connectors, as it is very very common that mercedes-benz blind spot assist sesnors fail due to water or moisture getting inside the connector, as these parts are mounted under the arch on the rear of the car and it is exposed to water coming out of wheels.
Additionaly pay attention to the connectors, whcih plug-in to the sensor, make sure there is no moisture at all, because many customers are complaining that mercedes-benz blind spot assist inoperative warning message has started to appear after car wash, which means water got on or inside the radar.
Another thing you should pay attention when testing active blind spot is that system is only active when you are driving car at speed over 20 mph (30 kmh). Blind spot system is deactivated if you are driving above 20 mph.
Mercedes-Benz blind spot radar sensors are being produced by Sweden company Autoliv ASP Inc. to ensure the best quality oem parts and comply with all regulation laws. Autoliv ASP Inc produces radarsensors at Canada, USA and or Sweden.
Below you'll find a list of cars using blind spot radar as well as a list of part numbers. Another very important thing about radars are that each time you replace it, you'll need to do coding yourself using dealer Xentry software or paying for MB specialists to do that, otherwise sensor might remain deactivated and the same applies for other sensors such as distronic, collision assist and many other.
Mercedes-Benz cars using blind spot radar:
- B-class W242 W246 B250e
- CLA-class W117 C117 CLA250 CLA45 AMG
- CLS class C218 X218 2011 2012 2013 2014
- CLS class W218 C218 X218 2014 2015 2016 2017 2018 2019
- CLS class CLS350 CLS400 CLS500 CLS63 AMG CLS220 CLS250 CLS350 CDI BlueEFFICIENCY BlueTEC
- C class W204 S204
- C Class W205 Saloon Sedan 2013, 2014, 2015, 2016, 2017 2018 2019
- C Class S205 Touring Estate 2013, 2014, 2015, 2016, 2017 2018 2019
- C Class C205 Coupe 2013, 2014, 2015, 2016, 2017 2018 2019
- C Class A205 Convertible Cabriolet 2014 2015 2016 2017 2018 2019
- C Class C180, C200, C220, C250, C300, C350, C45 AMG, C63 AMG, BlueTec, 4Matic
- E class W212 Facelift Saloon Sedan
- E class S212 Facelift Estate Wagon 2013 2014 2015 2016
- E class C207 Facelift Coupe
- E class A207 Facelift Convertible Cabriolet 2013 2014 2015 2016 2017
- E class E200 E220 E250 E300 E350 E400 E550 4MATIC CGI BlueEFFICIENCY CDI BlueTEC
- E Class Coupe C238 2016, 2017, 2018, 2019
- E Class Convertible A238 2017, 2018, 2019
- E Class E200 E250 E300 E350e Hybrid E400 E450 E43 E53 E63 AMG
- E Class E200d E220d E300d E350d E400d 4Matic
- GL350 Bluetec GL450 GL550 4Matic GL63 AMG
- GLA 250 GL45 AMG
- GLC X253 W253 Hatchback 2015 2016 2017 2018 2019
- GLC C253 Coupe 2015 2016 2017 2018 2019
- GLC63 AMG GLC43 AMG S GLC300 GLC350e 4Matic GLC250 GLC200 GLC350d GLC250d GLC220d
- ML-class GLE300d GLE350 GLE400 GLE550e GLE63 AMG
- ML-class ML250 ML350 ML400 ML63 AMG
- SLK W172
- S Class C217 Coupe 2014 2015 2016 2017 2018
- S Class A217 Cabriolet Convertible 2014 2015 2016 2017 2018 2019
- S Class W222 Saloon Sedan 2013 2014 2015 2016 2017 2018 2019
- S Class S320 S350 S400 Hybrid S450 S500 S600 S63 AMG S65 AMG S300
- Vito W447 Van Bus 2014 2015 2016 2017 2018 2019
- Vito V200 V220 V250 109 CDI 111 CDI 114 CDI 116 CDI 119 BlueTec
- Sprinter W906 2015 2016 2017 2018 2019
- G-class W463 SUV
Mercedes Benz Blind spot radar part, SW and HW numbers:
- ZB A0009054907 SW A0009024035 HW A0009018504
- ZB A0009052806 SW A0009029029 HW A0009013503
- ZB A0009052504 SW A0009020221 HW A0009018802
- ZB A0009056103 SW A0009022617 HW A0009018802
- ZB A9069003802 SW A9069024501 HW A0009013001
- ZB A0009058104 SW A0009028824 HW A0009056700
- ZB A0009054503 SW A0009027516 HW A0009018802
- ZB A0009050110SW A0009024104 HW A0009051300
- ZB A0009062000 SW A0009027400 HW A0009051300
- ZB A0009062600 SW A0009027600 HW A0055425918
- ZB A0009059707 SW A0009024836 HW A0009010405
- ZB A0009050210 SW A0009024604 HW A0065428118
- ZB A0019053100 SW A0029025300 HW A0065428118
- ZB A0009058802 SW A0009026713 HW A0009017901
- A9069002203 0203300898
- ZB A0009052804 SW A0009020721 HW A0009013503
- ZB A0009052511 SW A0009026446 HW A0009017503
- ZB A0009052511 SW A0009026446 HW A0009017503
- A0009051812 A0009051912 A0009055510
- ZB A0009050010 SW A0009024004 HW A0009051300
- A000905001028 A0009053100 A0035400517
- A0009050610 A0009025405 A0009013001
- A0009052604 A0009020321 A0009018802
- A0009053303 A0009027216 A0009013001
- A0009057502 A0009025712 A0009013001
- ZB A0009057405 SW A0009021329 HW A0009018802
- A0009057502 A0009025712 A0009013001
- A0009058702 A0009026613 A0009056700
- A0009058406
- A2319055302
- A0009055701 A0009028407 A0009056700
You should have your car assessed and, potentially, replace the sensors.
Here at Xenons4U, we aim to provide high-quality parts at excellent prices - contact us for more help with your Mercedes Benz, or browse our range of Mercedes Benz parts.
