My car finally arrived at the dealer. Just 3 more days for the reg and I can drive it home.
Standard 2.0 with the Brembo brakes and variable diff & damping
As was said - bolts apply tension, and bolt-head/washer bearing surface and the pressure generated by the tension is what prevents sideways slip.
A nylon washer may cause slip (depends on the washer) or require more torque...
The other option would be like a diamond coated friction washer if...
Also, EU car makers are under extreme pressure to make cars untamperable: https://dias-project.com/
And unfortunately due to CyberSec regulations (read this with google translate because I did not find an English page yet): https://de.wikipedia.org/wiki/UNECE_R_155
and R155/R156...
This is a interesting (somewhat funny) thread. I work at DENSO, so one of the ECU/electronics/actuator suppliers. In my early days (about 10 years ago) - my job was involving some of the software that makes the check engine light come on. :)
Some things I would say - without knowing anything...
At least you had a date.
I had about 8 quotes, some answered unknown leadtime.
One dealer clearly said 7 to 9 months.
Last dealer that I ordered from said, 3 to 6 (but I am 100% certain it is 7 to 9 months).
After signing my lease contract, 3 weeks passed and still, now ball-park lead-time yet...