M177_HAMMER

I have a 2019 E63s w// 2,700 miles, just did the Rear Differential service 4 weeks ago. as recommended for the W213 E63s model only at 2k miles.

2 Weeks ago did a Renntech HHT and had a random error code yesterday while the car was driving for about 3 mins after warming up (sub 40 degree weather) in Comfort mode. All these warning lights went on in the left dash window, no change in power steering nor limp mode or anything like that - just sensor warning lights. Primarily ESC, traction, and rear differential operation warning. I was going about 15 mph, so I pulled over, shut the car off and restarted the car. All the warning lights disappeared and the car drove normally.

Has anyone seen issues like this on the W213 with Renntech HHT tune? Just concerned now for road trips and drive that are away from home if this becomes and issue.

2secclub

I've had mine a week or so, no issues so far, hopefully I won't. Good luck.

David Bogle

did you "flash" it then go for a ride? every time i flash mine, i get all those same errors. if you keep reading the instructions, you must do 2 power up cycles on the car to clear all those. so shut it off, open door, and repeat. should clear it up

M177_HAMMER

I flashed it 3 weeks ago. It’s been flashed for awhile. I haven’t switched back or anything

raudiace4

You should scan the car for codes. If you don't have a scanner, go to any local auto parts store they will scan if for free.