Unless you have EDC or adaptive suspension, there is nothing to reset or calibrate. With a quote of only 6K at BMW I doubt it has this. In fact I had my EDC set replaced recently and even after installation it didn't throw codes or ask for calibration... though it is done as part of the process.
For what its worth, if you can understand a bit of German and are willing to engage in a bit of "high seas" activity, it is fairly easy to get a diagnostic and coding setup running. OBD2 reader and an aliexpress ENET cable have served me well on many cars... many people I know who are also planning to keep very complex cars out of warranty do this and it is worth having IMHO just to avoid the dealer taking you for a ride if you cant find a decent one.
F-series definitely will let you read the error off the key memory... not sure about E... but again not for regular suspension or normal wear - it will show an EDC or adaptive suspension error if there is one.
Bilstein is a good brand. Goldwagen, Koni or Firi (who can give you upgrade options as well possibly) mentioned above are good bets.
