Mercedes A200 2.1 Engine issues

[neal1980]

Hi,

I have a 2015 A200D 2.1 Mercedes and it started to become sluggish including a misfire and struggled to idle but once warm seemed better but not perfect. After a few weeks it seemed to be getting worse and it would often stall at junctions. It eventually gave an engine light P0272 Cylinder 4 Contribution/Balance.

It went into a garage and they replaced Injector 4 and coded it, from the second I picked it up it wouldn't rev over 2500 then once I restarted the car it drove up the road but very lethargic. The garage said it would need a regen before things settled down and take it on a long run. I have since done several very long spirited runs and constant and when I got home the exhaust was pinging and was roasting hot which I though would be a good indication of a re-gen.

The light has come back on again now same fault code exactly, annoying after spending out what seems for nothing.

Any ideas or known issues that could cause this or I could check related to the fault P0272. I have a cheapo code reader than can get some engine data off and pretty handy with some spanners back in the day


Thanks
Neal

[E-bmw]

Get a compression test done.