2009 SL550 Silver Arrow Launch Edition, 2013 Mercedes Benz C300 4Matic
I am aware of the "normal" shift delay from 1st gear and beyond when the engine is cold. I can usually predict the approximate location in my neighborhood when it will start shifting up as it warms up. But today, I never got out of 2nd gear as I was on my way to have a check engine light checked out at dealer. I was almost there (about 5-6 miles away) stopped for a red light, put it into "Park" and back into "Drive" and it shifted fine from that point on. Dealer thought the "shifter" could be the reason for the check engine light (?).