MB-CLS500

Hello I just bought S65 AMG it had some tehnical issues its engine had power loss I changed both turbos , fuel injectors , fuel filter , fuel pump , spark plugs and after changing these parts car still has same issues and gearbox shifts take longer have anybody expirienced something like this on s65 amg??
here is the picture of the car

123Pokey321

Have you been able to hook it up to a scanner and see if there are any codes present? That's where I would start. Also, have you checked the fluid level/condition in the transmission? You had mentioned shifting issues, so I would definitely check that as well. Good luck.

MB-CLS500

yes I checked everything at my local MB dealership instercooler pumps works intercooler itself works we are having difficulties finding problem

alx

have the transmission adaptations reset via das.

if that does not help - you will need some advanced diagnostics reading the tcu real time data and comparing it to a good one

has the car been flashed (especially the tcu) in any way?

MB-CLS500

Yes It came with RennTech tuning from EU it has Carbon airbox and other renntech upgrades I will post the upgrades with details

alx

reset your tcu adaptations, but beyond that- you are on your own... if anything see if you can replace the tcu with a stock one (coding might be required) and if your problem goes away.

shardul

iTrader: (1)

+1 on the adaptations reset.

MB-CLS500

thanks for responses I will post for updates

MB-CLS500

gearbox works well now rev limiter kicked in when it made a bad shift I also changed ignition coils on both siides still no results

shardul

iTrader: (1)

do you feel like the transmission is slipping.

MB-CLS500

no transmisson feel ok now . When you press gas pedal to WOT car do not wants to go rev needle goes up very slowly

alx

Reset engine adaptations and have throttle body relearn

pas

My car was doing something similar i think. You would be driving along all normal and then the exhaust note would change and there would be no power specifically no turbo boost. Shut the car off and sometimes it would go away sometimes not. My problem turned out to be a faulty ignition switch, but my car is stock with no mods.

MB-CLS500

I will check that as well but star diagnosis must have showed that faulty code I think