Power loss car feel sluggish
08-02-2020, 05:51 AM
#1
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c63 w204 507 edition
Power loss car feel sluggish
hey everyone. C63 2014 owner here. New to this forum hope someone can help. I got 70k km on my 507 edition i just changed spark plugs and air filters thinking it would help with my power loss but it seems thats not it. The car feel sluggish like is missing 200hp and tq. And my check engine isnt on. I dont know where to look and i dont want to take it to the dealer since everytime i take it there they f*** up somethings. Thanks alot !!
08-02-2020, 09:44 AM
#2
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Take it out of comfort mode. 
It could be transmission adaptations, there's a procedure to reset you can search for but may be easier to just disconnect the battery overnight. Then drive the hell out of it when you get going again. If you don't have a code reader, that may also be helpful, could be something hidden/not triggering a CEL.
It could be transmission adaptations, there's a procedure to reset you can search for but may be easier to just disconnect the battery overnight. Then drive the hell out of it when you get going again. If you don't have a code reader, that may also be helpful, could be something hidden/not triggering a CEL.
08-02-2020, 11:48 AM
#3
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hey everyone. C63 2014 owner here. New to this forum hope someone can help. I got 70k km on my 507 edition i just changed spark plugs and air filters thinking it would help with my power loss but it seems thats not it. The car feel sluggish like is missing 200hp and tq. And my check engine isnt on. I dont know where to look and i dont want to take it to the dealer since everytime i take it there they f*** up somethings. Thanks alot !!
get a code reader. Check if any stored codes. Run some data logs. Look at your throttle plate opening percentage as well as fuel trims a/f ratio ect ect
08-02-2020, 12:15 PM
#5
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2012 P31 C63 Coupe Trackrat, 2019 GLE63S Coupe Beast
“I’m down on power, what wrong” hahahahaha get ready for like a hundred different responses dude. Just look already.
Learn how to run the codes, it’s not hard. Go to Amazon and buy an OBD2 dongle and download an app, it’s easy.
Then come back here with the results. Then we can help you. Otherwise you’re going to keep getting suggestions from all over the map from people who don’t know what they’re talking about.
Learn how to run the codes, it’s not hard. Go to Amazon and buy an OBD2 dongle and download an app, it’s easy.
Then come back here with the results. Then we can help you. Otherwise you’re going to keep getting suggestions from all over the map from people who don’t know what they’re talking about.
08-02-2020, 12:36 PM
#6
MBWorld Fanatic!
Run car to empty and put shell 93 in the tank. Go from there because it can be a lot of things.
If you don't have a scan tool unplug battery and let the car start fresh with the new gas..
I've seen clogged cats from failed pcv valve into the intake.
If you don't have a scan tool unplug battery and let the car start fresh with the new gas..
I've seen clogged cats from failed pcv valve into the intake.
08-02-2020, 04:51 PM
#7
MBWorld Fanatic!
I'll go with one of your fuel pumps died. However you need to go somewhere that knows what they are doing. If the dealer is screwing your car up, you're taking it to the wrong place or tech. Find another.
