Join Date: Oct 2004
Location: MUC/LAX/SMV
Programs: LH, UA, BD, AA, NW, FB, NH, AC, Sixt, Hertz, Avis, *W, HH, Marriott, PC, Leaders Club, AMEX
Posts: 12,406
Your success depends on how well the agent processing the upgrade knows the rules, insists on the rules or even recognizes the (often conflicting) rules.
It's the same with UA/LH Z fares ex USA. They all feature a quite visible "fare not upgradable" rule. OTOH, LH M&M miles & eVouchers and UA MP paper SWUs for use on LH metal specifically allow upgrading LH Z fares. So, which rules apply? Those printed on the upgrade vouchers, or those printed in the fare? As usual, YMMV.
Remmber: common sense and consistency are not to be found in the airline industry.