audi a4 1.8se starter probs
 

hi all,my audi a4 1.8se 1999 is having trouble startying every day (man its doing my head in)i turn the key epc shows try to start her sometimes she will start first time other times it takes 10 min any ideas, just had a service and new mot.the battry light flashes now n again whilst driving,not often tho,,but once started,it'll run fine all day,, can anyone help please. thankyou
also mechanic has said there's nothing wrong with starter motor.