Three ML questions (Ipod and Airmatic)
2. My wife is very sensitive to ride quality. Her current car is a Lexus (at the far extreme of sacrificing road feel for a smooth ride -- too far for my taste). She greatly dislikes driving the BMW X5, for example, because it feels too rough for her. The ML350 felt pretty good, but she's interested in anything that gets her a smoother ride. She hasn't done a test drive yet on the ML550, because the dealers near us don't have one in stock right now, but the salesman told us the stock suspension on the ML550 is tuned for greater performance, and so will be a harsher ride. This makes some sense as those who choose the 5.5 are likely more performance oriented, but I wanted to confirm that this is true (as the salesman said a number of other things that I know are quite wrong).
3. If we get the ML550 with Airmatic, does that make any meaningful difference in harshness of the ride? Does it bring it back to the ML350? Is it better than the ML350? We test drove an Audi Q7 with the air suspension, and she felt the comfort mode on that suspension meaningfully improved the ride. I think the Airmatic adjusts automatically rather than through settings (maybe that's wrong), but what I'm really interested in is how much of a benefit to ride quality it is. Possible it's focused more on adjusting for uneven car loading or tilting toward greater performance rather than smoother ride.
There is, however on my ML, very little difference between Regular and Comfort.
I have no idea whether the salesman's comment about the stock 550 suspension being stiffer is true or not, but I believe all Airmatic suspensions are identical, with the exception of the AMG in which it is tuned a little tighter across the board.
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I've had them upgrade 3X under warranty; and it's working well now.
Airmatic has three levels: normal, raised, and lowered. You can only control 'raised'. You do that with a dash-mounted switch that raises the vehicle by 80mm for snow or sand driving. (Also handy if you scrape a concrete parking abutment and want to rise off it before backing off!) Over a certain speed, about 10 mph I think, it lowers itself back to normal regardless of the switch setting. If you have the suspension set to Normal -- also a switch -- it will lower itself automatically at highway speed by about 7mm and the shocks will tighten up in twists and turns. If you set it to Comfort, the same thing happens but the shocks don't tighten up automatically. (In the ML63, Comfort also raises the vehicle by 7mm because its normal setting is lower than on other MLs.) If you set to Sport, the suspension lowers 7mm and the shocks tighten up permanently. Finally, when you switch off the engine and close all the doors and hatch, the suspension 'relaxes' and slowly drops by another 5 - 10 mm. Whenever you subsequently open a door, the whole thing hisses and puffs while it is deciding what to do.
If your wife is vertically challeneged, the answer is running boards. They are actually quite functional for shorter people. For taller ones (eg: yrs trly) they serve to deposit copious amounts of dirt on the back of your pant leg until you have learned the correct technique for exiting the vehicle.







