97 V70TDI with defective cruise control

Hello in the round! Unfortunately my favorite toy has said goodbye to my oil burner – the cruiser doesn’t make a sound anymore. Engine control light was on at times, error reading revealed a defective pedal switch on the brake. So switches changed, errors deleted – and the cruiser still doesn’t like. However, the error is not set again. Now I have 2 suspects: On the one hand the turn signal lever or its div. cruiser switch, on the other hand the responsible control relay. However, the search for forum revealed for me contradictory information, which relay is now affected (once 101-102, once 106) Is there meanwhile secured information for this purpose? And if yes, what part number does the relay have or what does it look like, so that I can look around a corresponding part of the butcher? Or maybe someone has a corresponding lying around, which I can use for a sample and possibly acquire…