Bought a RHD 2006 W164 ML63 couple of weeks ago everthing was great until last night
Car was idling nice and low like normal engine was fully warmed up
I heard idle increase to about 1000 RPM so i turned the engine off
restarted it and the ESP and Engine light stayed on engine barley revved so in limp mode confirmed by trying to move the car
read codes have the following
3647 Throttle valve actuator signal implausable
3619 Throttle valve malfunction
3633 Throttle value actuator 2
Any help or pointers please

Turned out to be a duff battery even though the battery cranked and started the car no problem
When i checked it with a meter volts were fine even on crank but amps were down to 440 against 800
What i did was connect by jump leads my new battery whilst old battery was still in place so voltage would be the same but there would be an abundance of Amps
The car previously cranked fired and idled but the revs would only increase to 1200 RPM
Now the car cranked fired and idled but revved to soft cut 3000 rpm si i connected my software cleared faults and had a massive smile