2010 GL 450 level sensors ride height questions
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Newbie
Joined: Jul 2025
Posts: 5
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GL450 X164
2010 GL 450 level sensors ride height questions
My son purchased 2010 GL450 156000 miles from used car lot (wife is not happy with his purchase). Me as the resident shade tree mechanic I try to help out whenever I can. Transfer case change that is giving at 160000 miles (my son suspects his oldest boy, senior in high school, heavy foot acceleration exacerbated the problem). My son and I replaced transfer case chain. At 170000 mile right side passenger air spring blew out. I have replaced both front end air spring/shock assemblies. Using lunch scan tool I see what I consider reasonable level sense voltage is in rear ( approximately 2.5 volts left/right rear) but very different voltages front (left front 1.5V, right front 3.5 V. Ride height measurement both left and right front approximately 35 mm. This is my first experience working on a Mercedes-Benz so I have no baseline to work from. My concern is ride height may be too high requiring excessive air spring pressure. Also question why such large differential between left and right front level sense voltages. Would greatly appreciate anyone offering there thoughts as to what am seeing/need to do.
Thread Starter
Newbie
Joined: Jul 2025
Posts: 5
Likes: 0
GL450 X164
Made a "rookie" mistake after changing front air spring struts. Didn't take it for a test drive. This caused everything to settle out. Readings are now much closer to what I would expect. Front level sensors are 2.2-2.5Volts. Height of both left and right almost identical -20 mm. I do have a imbalance in the rear which I suspect is level sensor. I will be replacing rear springs as time permits. Sorry for any confusion as I said I am Mercedes Newby.
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Joined: Jan 2014
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From: USA - Minnesota
2014 GL350
@WB2010 FYI, a 2010 GL450 is a X164 not a X166. Although there are many similarities between generations, there are also many differences, so I’d suggest posting in the X164 subform for the best responses.
