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i said goodbye to my baby tonight and got a new c63s sedan,
got almost 16 percent off sticker so I was happy with the payments.
bitter sweet to to be honest. The w204 never had one problem but normal oil change and brakes and tires.But I must say the sound and grip and steering feel is a whole new level. I pushed it alittle on the way home, but how can you not. I’ll baby it till I hit 1000 now. What mileage did people add tunes?
Also so I the car had the illuminated star in the doors only. Does anyone know how to get rid of that?
whats the reasoning behind breaking it in that way?
Just curious, I hear everyone telling me to keep it under 4500 rpms?
When a motor is breaking in or wearing the the ringlands in with the cylinder wall to form a seal, it happens very quickly within the first 20 mile drive. You want the rpm to vary as much as possible while warming the engine up and once it’s up to full operating temp increase the throttle to 50% a few pulls, then 75% a few pulls and then 100% wot for several pulls. Doing this slowly adds pressure behind the rings, which create a proper seal to the cylinder wall. Sure it will happen even if you kept the rpm under 4500 but it won’t have as good of a seal as doing it the correct way which will result in slight power loss from cylinder pressure escaping past the rings.
When a motor is breaking in or wearing the the ringlands in with the cylinder wall to form a seal, it happens very quickly within the first 20 mile drive. You want the rpm to vary as much as possible while warming the engine up and once it’s up to full operating temp increase the throttle to 50% a few pulls, then 75% a few pulls and then 100% wot for several pulls. Doing this slowly adds pressure behind the rings, which create a proper seal to the cylinder wall. Sure it will happen even if you kept the rpm under 4500 but it won’t have as good of a seal as doing it the correct way which will result in slight power loss from cylinder pressure escaping past the rings.
... Are you sure? The car's manual specifically says otherwise... Why would they spread misinformation through the manufacturer's manual?
... Are you sure? The car's manual specifically says otherwise... Why would they spread misinformation through the manufacturer's manual?
100%. They do that because they don’t really care if your car is slightly down on power (maybe ~5%) from not completely sealing the rings to the cylinder walls and I’m sure it has to be a liability for them to tell every Mercedes owner (most that don’t know how to drive lol) to go floor their new car performance everywhere. Not saying you couldn’t do what they recommend, but you wouldn’t get optimum power out of your motor.
Ah... The liability thing makes sense... Oh well I lisl some hp I guess haha
There is still a lot of controversy on how to properly break in new motors. Please don't take 1 persons word for it. It is certainly possible though unlikely for Mercedes to deny warranty request if they see break in procedure was not followed.
I've run in a couple of AMGs recently. if you do want to follow the recommwnded procedure then here's how I did it. I don't rag it and don't do hard gear shifts. When the engine is cold it is left in comfort mode . once warmed up and after ive got through a couple hundred miles, I drive in sport and sport plus I do however leave it in auto shifting mode and then drive in any mode i like. the on-board computer on these AMGs is brilliant at shifting early during the 1k period and then when you get closer to 1 k miles then it automatically revs higher and higher on shifts and even up to 4k.
throughout I try and vary the revs as much as possible and briefly take the revs up once in a while to 3.5k early on and then 4k after a few hundred miles .
it would be very interesting to stick it on a dyno and check how little power it's got as a result of this lazy break in
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.
