Marek_Norway

Hi, suddenly engine light came on on my glk 220 cdi 4 matic, got it on diagnostic, fault code P027227 - Teach-in of the operating parameters for cylinder 4 has a malfunction. The signal change rate is above the permissible limit value. Drove it to the merc dealer, they tested it, put some injector cleaner, cleared the code and let it go, they said if it won't help, they replace the injector. After couple days engine light came on again, same error...drove to the dealer, they replaced new injector, cleared the code...after another few days, engine light came on again, same error...anybody suggest what should be done next? There is no power change, no weird sound from engine, no smoke, no change at fuel consumption, no change at all, just the engine light...the car has 192k km on...Sometimes, the engine light disappears, but after couple of kilometers comes on again...
Thanks for any advice or help..

Savania

Did you manage to get to the bottom of this issue?