2012 GL450 buying advice




Don’t assume anything until you know the vehicle’s maintenance history and current needs.
Every
single
GL
I have seen on a lot around 100 K is sitting on its original, leaky air springs.
So the first thing you’ll be doing is swapping air Springs!
Every
single
GL
I have seen on a lot around 100 K is sitting on its original, leaky air springs.
So the first thing you’ll be doing is swapping air Springs!
Last edited by Kingstonlake; Mar 23, 2022 at 08:18 AM.
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use this as negotiation leverage, unless you already bought the car.
although these these don’t rust much, anything that has spent any time in the rust belt
will benefit from a PPI.
use this as negotiation leverage, unless you already bought the car.
although these these don’t rust much, anything that has spent any time in the rust belt
will benefit from a PPI.




that Won’t be the case.
At 100k miles, that GL is ready for $3000 worth of regular maintenance on the Airmatic suspension. The rubber air bags that serve as springs are limited life components. So of course are hydraulic shock absorbers on any vehicle, and while the fronts are struts and you’ll replace them along with the springs, on the rear they are separate but also ready for renewal. A spring failure is a you can’t drive it event.
if this maintenance has already been done with typical aftermarket parts, the life won’t be 100k miles. If the rubber springs have been replaced by steel coils the vehicle has essentially been destroyed and it’s value is next to zero.
PS many gush over Arnott, but that’s psychological because these items are cheap. Many gush over the free replacement and many post they needed it but again that’s part of being cheap … you indeed get what you pay for. The Mercedes parts are not overpriced for what they are … which is better.
Last edited by lkchris; Mar 24, 2022 at 01:43 AM.
I’ve been using Arnott bags in mine and replace the rear bags, free of cost; appx every 2-3 yrs and I don’t tow heavy with it.
once you get the hang of it it’s a 30 minute job a side.




I’ve been using Arnott bags in mine and replace the rear bags, free of cost; appx every 2-3 yrs and I don’t tow heavy with it.
once you get the hang of it it’s a 30 minute job a side.
One of the few things I would recommend as a necessity for factory parts is the OE wheel speed sensor. Go with OE factory MB wheel speed sensors or you will replace the aftermarket ones every 20k miles or so. Not a big deal to change but the cost over time savings is not worth it even if you do yourself.






