So the adblu light came on in my M Class in April so topped it up to no avail, and the run down counter forced me into putting it into the dealer for a diagnostic. They said it just needed reset, great. Two days later it came on again and went in for another diagnostic and they discovered the adblu pipe needed replaced £££'s. two weeks go by and the adblu light and engine light came on, yes it had to go in for a diagnostic and the MAF sensor needed replaced. Diagnostics at £90 a time. MAF sensor £500 plus fitting. Two days ago the adblu light came on again and once again a diagnostic and they have found two sensors in the exhaust have gone, £990.
It just strikes me that firstly there is a big concern with adblu in general and secondly sensors are there to protect the vehicle yet it always seems to be the sensors that are the problem. This is my forth Merc, I will think twice before there is a 5th.
It just strikes me that firstly there is a big concern with adblu in general and secondly sensors are there to protect the vehicle yet it always seems to be the sensors that are the problem. This is my forth Merc, I will think twice before there is a 5th.