I just had a bunch of work done to my 2010 c300 4matic sport 94k miles and its running great however, I am getting an intermittent BRAKE message - EBD, ABS, and ESC inoperative messages and lights on the dash plus it says power steering malfunction generally only on the first cold start of the day, the lights come on after driving a short distance down the street. So I will cold start and drive to work when the ESP and ABS messages come on after driving about 25 feet and accelerating to 10-15mph, then when I leave work 8 hours later the messages and lights are gone. Has a Stored 5001 general ESP code and comes back each day after clearing it. I decided to just leave it and drive the car without playing with anything or clearing the code again, as I said it runs and steers great. I am just trying to find the root cause.

To give some history/background, all in the last month I had my rear subframe replaced, airbag recall with a low battery done ---- causing what I believe -- ESL failure ----causing --- had an emulator installed to bypass ESL lock, new H7 AGM Interstate battery from Costco replacement and last but not least my secondary air pump failed/blown 40A fuse for the 2nd time in 2 years which caused a check engine light that I repaired and cleared with the Launch Creader Elite V3. After all the repairs, except for the air pump, and driving about 50 miles with no messages - the air pump fuse blew and pump failed, which I replaced. This is right around the time theses messages started appearing daily. So now I have No check engine lights on, the car is running/steering/braking great, but I am getting this intermittent ESP, ABS, power steering malfunction and lights. Even after clearing the 5001 code it reappears the next day and same cycle, gone in the afternoon. I did notice that my new resting battery is sitting at 12.2 -12.3 volts when I start the car in the morning? It seems low for a new AGM battery, could this be causing the messages due to the voltage drop when cold starting? Was thinking about returning the battery for a different one. Anyone have some insight or any ideas? Thank you