When it comes to gas mileage, what is the ideal speed for highway driving in a Mercedes? Also, what are some good tips to improve mileage? (In addition to the usual things like no hard acceleration, etc). Thanks!
- of course keep air restistance down, no roof rack with skis, bikes or surfboards,
- don´t push the engine to high rev/m before it is varm and smoothly running,
- let it run on an even speed (rv/m),
some additionals depend on the make you drive,
- lower the suspension,
- set the car in comfort mode
- use distronic, radar dependent, speed control, as much as it is possible to do safely,
We usually get between 9 l to 10.1 l /100 km from our E500T. Would most probably get more if we disconnected, phone, navigation, music, and most important the AC, whid takes a lot of energy to run.
As slow as you can get away with, and at a constant speed. It's boring, but I can get really great milage in my E320 4-matic when I take it easy. During the latest price hikes here I kept to the speed limits and accellerated as cautiously as possible and saved a significant number of miles per dollar. (But that's boring, so I usually get around 21MPG...)
If your fuel economy suffers from using electronics (i.e radio, Phone, GPS, etc), then you have some serious problems in the car. The alternator turns all the time, only the AC should put a load on the car and cause an economy drop. You can cruise all day long with the Radio and GPS on, it will not affect the milage.
Nevertheless, when Mercedes claims it does 100 km on 8.4 - 8.6 litre, I am convinced they turn everything off that is not essential for keeping the car moving. In any case between 9 and 10 litres is not bad for a 5 litre V8.
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