No
Luis' responsibilities give him significant power over the operation of Pablo's restaurant business. A service such as lending him a van would certainly cast doubt on Luis' impartiality and would potentially influence his professional behaviour. Responding positively to this request would put both of them in a dangerous situation. In many countries, the person bribing the other and the recipient of the bribe have the same level of responsibility under the law. In some countries, the convictions of the recipient are even more onerous than those of the person bribing the other.