2015 Mercedes Benz M Class 350 bluets Loss of MPG and performance after SRPC1921

Mercedes Benz M Class Problem
The Problem
Avatar
Nick Georgiou

Profile
Loss of MPG and performance after SRPC1921
Mar 14, 2020 (3 weeks ago)
Hi there

Many owners of the W166 MERCEDES who have had the recall SRPC1921 are experiencing issues. Loss of MPG, loss of performance, running rich, rough idle and hesitant when cold.

Have reported back to Mercedes and yet they are to respond. Please can you help us? I have been on a lot of W166 forums and all are experiencing the same issues since the recall.

Please please help us.

Car details
Car: Mercedes Benz M Class
Variant: 350 bluets
Model Year: 2015
Category: Engine & Drivetrain
Running Rough, Starting & Power Loss
Electrics, ECU, Warnings & Lights

Recalls: Mercedes Benz M Class Recalls
More: Mercedes Benz M Class Problems
Replies and solutions
Avatar
whittingehame
Fixes: 12,290
Profile
Mar 14, 2020 (3 weeks ago)
Cant help you with that , I'm afraid . You will have to take it up with Mercedes as the software recall is emissions related which ties in with what you and others are experiencing .
Post a reply
Please login to reply
Planning on fixing the problem yourself?

If you need parts to do the job head over to Euro Car Parts to find the parts you need.

  • Free UK Delivery
  • 365 Day Returns
  • Free Click and Collect
Fix your M Class problem

Get answers from experts and owners

Add your problem now, it's quick and easy.

Get Answers & Solutions
Find your nearest
Recent Car Problems
Diagnostics App

Identify problem parts

Try it now
On Social Media