Thanks to both. Guess i won't bother with any additives then
Yes i think i need to return the unit for Andrew to put new software on, plus a new wiring harness. But considering the issues above (incl red hose pipe residue), the box won't cause any damage if left on +10% or +20% will it? I'm in no dire need to do it but its so tempting!
Do you read and delete codes from the DTUK box before any warranty work? Can't BMW find out when hooking it up to their German servers?