I have a 2018 E63S, it is not pulling the same. What can it be?? The initial pull is not there or where it used to be when i first got the car. It sounds normal, it actually sounds like im going fast but im not pinned to my seat when flooring it. Even when i launch it, its not as quick as it used to be. I took it to the dealer and they told me that it's just my air filters. I dont believe it, i think its something more serious, does it have to do with my spark plugs?

 

Hi and welcome to MBworld!

For technical questions your post in the C63 forum, linked below, is the best forum for getting answers. Good luck!

Bob

https://mbworld.org/forums/c63-c63s-...ml#post7870632

 

Welcome! Please post a photo of the E63.

 

moved to W213 AMG forum...
possibly reset ecu adaptations...

 

Possible cause is exhaust valves sticking. At least two members have experienced this. There is a recent thread on the topic - should be within a couple pages of the top.

 

And "exhaust valve" here means the performance exhaust system component, not the ones in the cylinder head. And yes, when they fail the engine's power is throttled.

 

Did you recently change tyres? I had the same problem after dealer fitted winter tyres on my E53... They fitted jaguar homologated tyres iso Mercedes homologation which I requested... Exact same tyre except for the load index which was less on the jaguar tyre... This created more yaw under acceleration in the curves than the ESP computer expected and it cut the power significantly. It also backed the power off slightly but noticeably in straight line acceleration. Switched them for the same tyre with correct load index and power is back. Night and day difference. The ESP on these cars is hypersensitive. Dealer couldn't believe it but we verified it with test drives with the mechanics.