Engineer - Final Quest

Hello everyone,

just a Question on how to be able to finish the last Quest of the Engineer (6000 Points in Reparing vehicles in one match) 

I really don't get how that is possible in a normal match. Without any bugs you get nearly only half of the Points. I myself, got a bug where I could repair a vehicle even if it wasn't damaged, so I was jumping on one vehicle/others and repaired it the whole round and only got to 5800 Points ( x-x ) I don't think that it should be like that. 

Do I miss something or how is that Quest possible ?