Mercedes CLA power loss and the engine starts badly

Hey, I had a similar problem with my Mercedes A-Class (built in 2014, also a petrol engine). I had almost the same symptoms: black smoke, loss of power and rough engine running. I have a bit of experience with cars, but would say rather "low experience". At my garage they found out at the time that it was a plug/cable connection problem. The repair cost me 155 euros and afterwards the car ran like new again. If you give me some more detailed information about your vehicle (e.g. engine code or exact error codes), I may be able to help you better. LG

(Translated from German)

Hey, my CLA currently has 187654 km on the clock, and the last service was about 5000 km ago. Unfortunately, I don't have the exact fault codes to hand at the moment, but I could have them read out if necessary. Thanks for the tip about the cable connection, that could well be a possible cause. LG

(Translated from German)

Hey, okay, that helps a bit. Given the mileage of your CLA and the symptoms you describe, it may well be that the injectors are no longer working properly. I recently had further problems with my petrol Mercedes (again: A-Class, built in 2014), which turned out to be defective injectors. If your garage has already checked the cable connection, the next logical step would actually be to take a closer look at the injectors. In my case, replacing the defective valves cost around 600 euros, but was absolutely necessary to get the engine back into a reliable condition. It might also be helpful to read the fault codes directly with an OBD-II scanner. The codes could give us a more specific indication of whether the injectors are really affected or whether there are other problems causing the symptoms. If you have the error codes, post them here, perhaps we can then get to the bottom of the causes even better. Good luck and keep us up to date! LG

(Translated from German)

Hey, thanks for your detailed reply and the helpful tips! I will definitely have the cable connections and the injection valves checked by my garage. The 600 euros to replace the injectors is not cheap, but if it is the cause of all the problems, it would probably be worth it. I'll have the error codes read out and post them here as soon as I have them. Maybe that really will give more clarity. Thanks again and I'll keep you posted! LG

(Translated from German)

Hey I have a Mercedes Cla200d the following problem I have .... the car does not pull anymore and when you press on the gas pedal the car jerks and does not shift gears need urgent help ...comes from gelsenkirchen,if someone knows about it I would be very grateful to you

(Translated from German)

Hello Raser8, Your problems could be linked to transmission problems, fuel system issues, turbocharger faults, sensor malfunctions, or a blocked exhaust system. It's essential to conduct a diagnostic scan to identify error codes, check fluid levels, inspect the turbocharger, and consult with a qualified Mercedes mechanic for a precise diagnosis and repair. Please keep us updated on your progress and let us know if you have any further questions.