I have ordered a new car with the M178 engine, as my first ever Mercedes. What are the general thoughts on breaking/running it in? A quick google search shows two schools of thought on Mercedes engines, running it in for 1,000 miles, 4.5k rpm max, 85mph max, and lots of engine braking, or alternatively, giving it the full beans from day 1. Unfortunately I couldn't find any specific guidance on this engine. Any help would be appreciated.