its a big job, you have to raise the engine up to get the sump off, id do it for you for £300, including labour and repairing the balance shaft. but if you wanted a new balance shaft fitted it would be so much more as the balance shaft is roughly £800.
i see from the tread about the balance shaft on audi a4 you replaced yourself. my car is running ok but i have the same engine and could happen at anytime. i wanted to ask and what would you charge to replace the balance shaft?