Just for everyone's consideration, the vacuum adjust feature is of little use if you have a car with load-leveling. Indeed if you like you can use the system to aim your lights a bit further down the road; however, I found that when I rented 2 different Benzes in Germany last year with this feature, I invariably left the switch in the highest position.

I personally do not plan to activate the vacuum adjust system, FWIW

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"If God had meant for us to walk, why did he give us feet that fit car pedals?" Sir Sterling Moss

Michael
2014 E63S Estate
2006 SLK55
1995 E500
1986 Porsche 944 turbo