A word of caution........ don't neccesarily assume that it's the mass air flow meter, a.k.a. air mass meter, although this is a very very common problem particularly when you are heading towards 70-80,000 + miles. I hope, for you, it is this, as this is the most simple repair/remedy should it be that what's causing your problem. New ones usually average a couple of hundred quid, but most are available as remanufactured units for around £60-£80. You can fir one in around 5 minutes, and no calibradtion is neccessary, literally just pug and play, although its better to have the codes read and cleared, to not only "hide" the fact that there has been a problem with the MAF, but should you experience any further problems, you'll have a better chance of establishing the cause. I was unlucky- had similar symptoms on my girlfriends A3 Tdi (PD) tried a MAF, then a pressure converter, then an EGR valve, then an inlet manifold pressure/temperature sensor, vacuum pipes, turbo pipes ...... blah, blah until i arrived at a faulty ECU ( Bosch ones beginning with part number 0281 being particulary prone to faults causing overboost and causing the inlet manifol pressure to be exceeded causing limp mode) butto be fair Michi did say " No journey is too great, when one finds that for which one searches ", maybe be, but he wasn't paying for parts for a
F@@KIN AUDI. Anyway best of look with yours mate, and hopefully its "JUST" the MAF Sensor.<<<<< climbs down from soap box and heads for his Passat TDi which has never (touch wood) EVER failed him. I'm on my third one, which i get new every 2 years and they work and work fantastically. If everything in life was as reliable as a Volkswagen?? Mazeltoft!