93 Octane
2nd gear pull huge dip
9/30/2025
2018 Mercedes C300
Warm Start Hesitation when starting
For context, I occasionally get a 21A026 code on mhd. Two days ago I replaced ignition coils, spark plugs and oil. Yesterday I had my valvetronic adaptations reset due to a tapping noise at idle. The car hesitated to start twice today on warm starts. Here is my data log.