I have had similar issue with 2013 Z3 and what I found out is the speed set sometimes wont allow the full throttle to engage even though it sounds like it is. To be sure I would make sure the speed set is off and actually turn off the Tige Touch and restart it as I have had mine confused from time to time. Once you are on a fresh start up hit the throttle and see where it takes you it worked for me???
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