Engine software update ?
Thread Starter
Senior Member
Joined: Jul 2018
Posts: 250
Likes: 84
C 43
Engine software update ?
Took my 2019 C43 to the dealer for an oil change (I know, I know, Mityvac is on order) partly to see the operation. I hit 7000 miles and while Mercedes is no doubt smarter than I am, I always change the oil around 7k miles, which took my prior car, E46 BMW, to 334,000 miles, and I own this buggy too.
I asked them not to reset the service monitor, which they did anyway. Oh well.
The surprise was when I left the dealer. Boost appeared to come up a lot faster, and the car was noticeably more responsive. At stoplights, the idle is now 500 rpm, previously it was 6-700. The service record reflects only an oil change "multipoint service" and car wash.
Is there any sort of quiet update being done, or some Black Forest trickery. Def runs different, which is odd, because oil changes don't normally do that. If I want more power I wax the car, and that gets me that 15 hp extra as the car glides better through the air. /s
Prior runs with the Track package gave me 4.7 sec to 60, but after it was 4.5....so butt dyno and real timer agree-and the lower idle isn't my imagination.
Great car. Wish I could find a good explanation of what is actually happening with the various suspension modes and engine modes.
I asked them not to reset the service monitor, which they did anyway. Oh well.
The surprise was when I left the dealer. Boost appeared to come up a lot faster, and the car was noticeably more responsive. At stoplights, the idle is now 500 rpm, previously it was 6-700. The service record reflects only an oil change "multipoint service" and car wash.
Is there any sort of quiet update being done, or some Black Forest trickery. Def runs different, which is odd, because oil changes don't normally do that. If I want more power I wax the car, and that gets me that 15 hp extra as the car glides better through the air. /s
Prior runs with the Track package gave me 4.7 sec to 60, but after it was 4.5....so butt dyno and real timer agree-and the lower idle isn't my imagination.
Great car. Wish I could find a good explanation of what is actually happening with the various suspension modes and engine modes.
Senior Member
Joined: Mar 2018
Posts: 325
Likes: 103
From: Central Florida
'15 C400 and '15 ML350
Isn't there a break in period/oil? Was this your first oil change?
4.5 is more inline with what the car should do 60 in, not the 4.7.
Wonder if the ECU keeps rpm/boost more in check until the first service counter is reset?
As for updates, a trans update could have been done but im not aware of any engine updates unless the 19's had an issue that previous years didnt.
4.5 is more inline with what the car should do 60 in, not the 4.7.
Wonder if the ECU keeps rpm/boost more in check until the first service counter is reset?
As for updates, a trans update could have been done but im not aware of any engine updates unless the 19's had an issue that previous years didnt.
