Your Mercedes Is Shifting Hard on Central Expressway — Plano Heat May Be Cooking the Transmission
by europewpadmin July 25, 2026You’re crawling south on US-75 through Plano at 4 p.m., the dash reads 104, and your Mercedes starts shifting late and slamming into gear. That jolt is a warning. In triple-digit Texas heat, the automatic transmission runs hotter than almost anything else under the hood, and heat is what kills it. Transmission fluid breaks down fast once it overheats, and…