C220 AMG Sport Plus Design....Gearbox issues

[Stringpants]

Hi

I have a 63 plate vehicle as above..65K and the gearbox has lost gears..when cold works fine again..

Warranty is covering this but garage now sending The Valve Chest away as no faults were logged

Has anyone had this or knows something about it..I have never heard of this item

Thanks

 

[Stringpants]

Anyone ?

 

[Smart320]

Assume they mean the Gearbox Valve Body, try and Google that