Hello folks

I'm planning to do a full front suspension refresh, and as our cars have air suspension in the 4 corners, Im wondering which is the right car height to tight the bushings.

Im planning to measure the height from the center of the wheel center cap to the fender, then after replacing all the suspension components on one side I can use a jack to raise the lower control arm until the measurement beetween the center of the axle to the fender matches previous measurement with the wheel on.

Now the question is which is the right height measurement:

1- Engine running after returning from a drive
2- Engine off before starting the car in the morning.
3- Engine runnig on Sport
4- Engine running on Sport +
5- Engine running on Comfort

I drive normally on Confort and I have noticed when I park the car on the garage and doors open and close the car releases some air and gets a little more lowered.

I dint see references on WIS related to which is the resting height.

Thanks in advance

David

 

Sorry, I don’t have an answer. But, I do have a question…

I just bought a 2015 GL63 with 52k miles. Suspension seems okay, but maybe a bit clunky in rear. Going to have it checked. I’m no mechanic (on these).

Any experience with timeframes on bushings? Maybe there isn’t really an answer (roads driven, climate, normal load - all variables). But, just wondering if there is a typical range. Thinking 10 years might be that time (aging).

Also, are you going OEM, OE, aftermarket non-OE/OEM?

 

C (regular mode). That said, when I get our aligned I have them also align the GLS in "C" as that is how she drives the car. Time to time if I am in it I am in S and can feel the car lower (it is about 1/2"). If I lift the car it goes up at least 5" from C. I think it is closer to six.

Now, in my AMG we do everything in S+ as that is in general I have the height set. They align the car with the engine running and in the S+ suspension setting.

 

Thank you, appreciate the feedbak. After writing to the forum I found an article stating to use the Comfort mode height. My inittial concern was the car sit for hours a little bit lowered than Confort mode when the car is in the garage overnight. But I think that is permisible, compared with the car liftednin the air as you said.

Thanks

David

 

I bought used at 70k miles. I was more concerned about engine issues and didnt have experience with the car. Now Im 85k miles and I notice the front feels loose under ceratin circunstances. For example if lane assist kicks in and the car brakes in one side slightly it feels loose but I dont have any clonking noises, just loose. I do have a squeak when going over speed bumps slowly. Im assuming when the front strut was replaced they tight the nut withbthe suspension hanging. I need to take the wheel off loosen the bolt and rause the lower control arm and retight to see if the noise goes away.

About brand Im planning to go lemforder. Hopefully they will last 50-60k miles. I think your car uses the same parts.

The rear seems to be more expensive to do than the front. Lower control arms are like $600 each. Get the bushings part numbers, probably will make sense. On the rear I cant find the ball joint on the tire carrier, which if is bad will requiere a lot of money to replace.

This are my thoughts, but I havent check the rear suspension as it feels well planted even cornering in sport+

Good luck