Car tax residue, what’s coming to me?

Hello people! Still from the year 2000 have a tax refund at the tax office of a vehicle in the amount of 203 Euro. Would you like to pay this amount back now! ;-)))) In the tax notice it is written, that one has to pay for this of course delay surcharges. Here the wording: If you do not pay the tax until the end of the due date, for each started month of delay a delay surcharge of 1 % of the backward to one hundred German mark (now of course Euro) down So after 10 years this must be a huge sum, if I now go out of the 203 Euro. Who could calculate how much I would have to pay in total. If this would be utopian, I could expect the tax office to pay me a little bit, because such debts do not fall, according to my knowledge. So who can provide information? Thank you in advance!