I very much doubt that's the whole story, or that any of the German brands would have a cheaper hourly labour rate than Nissan.
No Ekona..German cars hasn't got cheaper hourly labour rate..but their customer service is second to none. I know that because i have had an Audi and BMW in the past! And please don't assume that i am over exaggerating stuffs about the poor Nissan customer service..have a read through my previous thread about the Nissan garage in Mansfield. And it will all be clear.