Hi , Car is A4 B8 3.0TDI last year out of convenience i booked the car in with quickfit for a new battery , well after a long wait the "tecnician" informed me they had tried to fit the wrong battery (dimesions were wrong) , i could come back another day as they did not have the correct battery in stock ,,, well i lost confidence and never bothered to return ,, does anyone recommend a battery / place of purchase ? all i know is the battery is under the spare wheel and its not regular size , thanks in advance