Brooklands are great I go there all the time for services and warranty work as they are my local. They are very good.
Also, I have had a similar experience when I bought my 507 in Oct 2018 (different Mercedes garage though).
4 new tyres
pads
brakes
service b
mot.
aircon regassed!
However, I did not get the keyless entry as I don't have it. I might go back now.
You will enjoy your car no doubt and that 2-year warranty is worth its penny.
Rocky
I will probably use them for the future services tbh, my local dealer is a franchise, and we have had nothing but problems with them servicing our GLE.
In no way would I consider them for this car