dmb007
Active Member
I have seen many posts regarding EML problems and I would like to add my experience re this problem.
I have had problems since last Jan (2019) with the EML light being orange on my E400.
The selling MB dealer initially cleared the fault and that worked for about 3 months before the EML came back on.
It took the dealer a further 3 visits (over a period of 9 months) to individually change 2 NOx sensors and a temperature sensor.
I was told that all sensors had now been changed as there were only 3 to change. So that should be problem solved.
BUT I asked (as my warranty period was coming to an end) if these new sensors would be warranted for a further 12 months.
The answer was no.
At the beginning of May (20) the EML reappeared but being lockdown it would be middle of June before I could get an appointment. This was subsequently cancelled the day before and rebooked for 13/07/2020 at 10:00.
I turned up for appointment at 10:00. The place looked deserted so after waiting for 20 minutes and making enquiries with 3 other branches of the dealership by phone without success I returned home.
At 10:55 I received a text cancelling said appointment.
No further communication from said dealer to date.
So that afternoon(Monday) I visited another MB dealership who could look at the car that Friday.
Long story short there are 5 sensors not 3 on the E400.
My understanding of this is (and someone please correct me if I am wrong) that there is a sensor at beginning of the exhaust system and at end
of the exhaust and a temperature sensor to activate system when up to temperature.
On the E400 it as a twin exhaust requiring 2 NOx sensors at the front and 2 at the rear plus temperature sensor.
So the new dealer replaced the sensors provide a 2020 C300 courtesy car and MB paid for the replaced sensors.
It remains to be seen whether the fix is permanent(long lasting) but I have more confidence with the new dealership to deal professionally and timely with any future problems.
Here's hoping I will not see that light for some time.
Regards
David
I have had problems since last Jan (2019) with the EML light being orange on my E400.
The selling MB dealer initially cleared the fault and that worked for about 3 months before the EML came back on.
It took the dealer a further 3 visits (over a period of 9 months) to individually change 2 NOx sensors and a temperature sensor.
I was told that all sensors had now been changed as there were only 3 to change. So that should be problem solved.
BUT I asked (as my warranty period was coming to an end) if these new sensors would be warranted for a further 12 months.
The answer was no.
At the beginning of May (20) the EML reappeared but being lockdown it would be middle of June before I could get an appointment. This was subsequently cancelled the day before and rebooked for 13/07/2020 at 10:00.
I turned up for appointment at 10:00. The place looked deserted so after waiting for 20 minutes and making enquiries with 3 other branches of the dealership by phone without success I returned home.
At 10:55 I received a text cancelling said appointment.
No further communication from said dealer to date.
So that afternoon(Monday) I visited another MB dealership who could look at the car that Friday.
Long story short there are 5 sensors not 3 on the E400.
My understanding of this is (and someone please correct me if I am wrong) that there is a sensor at beginning of the exhaust system and at end
of the exhaust and a temperature sensor to activate system when up to temperature.
On the E400 it as a twin exhaust requiring 2 NOx sensors at the front and 2 at the rear plus temperature sensor.
So the new dealer replaced the sensors provide a 2020 C300 courtesy car and MB paid for the replaced sensors.
It remains to be seen whether the fix is permanent(long lasting) but I have more confidence with the new dealership to deal professionally and timely with any future problems.
Here's hoping I will not see that light for some time.
Regards
David
.
