Got a 2010 e63, with 100000k kms
There is a few problems.
1. From a stop accelerating, sometimes the car jerks ...
2. Sometimes the car won't go into Park? So I have to shut off the car while its in drive, then it goes back to normal .
3. My car won't go into race start mode. I turn the kn.ob but it the RS won't light up. It doesn't go past M.
Does anyone have these problems, does it look like a tranny problem or something ? Please need help, just purchased this car used. And would like to fix the problems

 

1. Jerking. What "mode" are you in? If I use C, then mine does the same but in S or S+ it is not as bad. 2 different dealerships advised me that if you drive it a little hard it sometimes helps and the jerk is supposedly common for the type clutch that the car has.
2. No clue what's going on.
3. Race start. Have you read the manual? You cannot just turn it straight there without doing a few things first. If I remember right the car has to be warmed up, steering wheel pointed straight, and traction control might have to be off. I know there is a pattern and I haven't used mine lately.
Good luck. (You make me feel better knowing there is one like mine with that many miles and most things are working. I feel bad about my 34k miles)

 

I think it was in comfort where it was jerking.
I've figured out the race start mode today...
And my car hasn't gotten stuck in drive today. Weird. Everything seems to be working better this is my 3rd day of owning the car now.

 

Check your battery charge. When my battery runs low, the car starts doing some weird things. The jerkiness becomes exaggerated, the garage door opener goes crazy by opening different garage doors than the one intended and I had the issue where the car would not engage park. I've been keeping my battery charged by using a smart charger and I haven't had the garage door or park issue since.

 

Which charger did you use?

 

I use an old, cheap Black and Decker 2/6/10 amp Smart Charger I've had sitting around for years. It does the job if you know how to properly charge an AGM battery. Just google the techniques and you'll quickly learn how. Here's a quick primer:

The life of your batteries will be longer and happier if you charge them correctly. The best chargers on the market are 3-stage chargers. Use of a good quality 3 stage charger will significantly improve your battery's performance and lifespan. These chargers can be purchased separately or are included as part of many of the better quality inverters. When using a 3 stage charger, battery charging takes place in 3 basic stages: Bulk, Absorption, and Float.

Bulk Charge - The first stage of 3-stage battery charging. Current is sent to batteries at the maximum safe rate they will accept until voltage rises to near (80-90%) full charge level. Voltages at this stage typically range from 10.5 volts to 15 volts. There is no "correct" voltage for bulk charging, but there may be limits on the maximum current that the battery and/or wiring can take.
Absorption Charge: The 2nd stage of 3-stage battery charging. Voltage remains constant and current gradually tapers off as internal resistance increases during charging. It is during this stage that the charger puts out maximum voltage. Voltages at this stage are typically around 14.2 to 15.5 volts.
Float Charge: The 3rd stage of 3-stage battery charging. After batteries reach full charge, charging voltage is reduced to a lower level (typically 12.8 to 13.2 volts) to reduce gassing and prolong battery life. This is often referred to as a maintenance or trickle charge, since it's main purpose is to keep an already charged battery from discharging.

 

Thanks for the info. That saves me from having to google for the info. A few months ago, I noticed my charger's manufacturer (BatteryMinder) now taking temperature into account as well. Thus I'm wondering if I should get an updated unit with this temperature compensation feature.

 

I wouldn't worry about it since you proably won;t keep the charger connected long enough to do any damage. And if the Battery minder is a smart charger, then it already has built-in safeguards to not overheat the battery.

Besides, the heat from your engine does more damage to the battery than your charging efforts whcih is why they try to shield the battery compartment. Life expectancy of our batteries is in the 4-10yr range. I highly doubt my Varta will make it to 10yrs due to engine heat.

 

The only concern I have is during the summer time when a battery is hooked up to the charger in the garage around-the-clock while the other car is driven...and the temp in the garage is easily over 100 degrees+ F under the hot summer sun.