12:13 Jan 27 

I don't think you were too far off the mark, Martina. It may be along the following lines:
"If the right to withdraw from the contract under item 6 section a is exercised, the following actions will ensue consecutively. XX must reimburse the customer for his payments and compensate him for all necessary and beneficial outlay. The customer must return the received benefits and services (direct costs of return must be borne by the customer as agreed) and reimburse XX adequately for their use, including compensation for dilapidations if the customer has consumed or made use of the goods in a manner incompatible with the principles of good faith or justified enrichment. The customer's taking possession of the goods shall not be regarded in itself as reducing their value."
I used "dilapidations" because that is the term used for reduction in value of property owned by the German State (Bund) and made available for the use of the British Forces (eg barracks) and set against "residual value" (compensation for improvements/development funded by the UK) when the Forces relinquish the property. Finally, shouldn't it be "...der gerechtfertigten Bereicherung unvereinbare..."?

09:46 Jan 27 

I agree with David's interpretation of Zug um Zug. The sentence is fairly impossible. Looking closely at the sentence, I think the two things that are supposed to happen Zug um Zug are

1) XX has to reimburse the customer's payment and certain expenses
2) the customer must return the goods and pay a reasonable fee for their use prior to cancellation and, where applicable, compensation for their reduction in value etc ...

09:17 Jan 27 

but means simultaneously, at the same time as. Not sure what can be meant here though, since surely XX cannot repay the money immediately the cancellation is issued. I presume they mean simulatenously with the customer returning the benefits received, but that requires a different structure in German ("mit der Zurückstellung ...) I think it's just bad legalese - the writer thinks he's being formal but he's just thrown in a legal sounding phrase (in my opinion anyway). Perhaps the closest in English here would be "without delay" or "forthwith"