Imijassat

Hi, I'm new to this site. My '06 sl65 ABC suspension is sagging at the left rear wheel. It usually takes about 3-4 hours to notice the sag when the car is parked off. When idling, the car remains sagged and as soon as I place the gear into drive, the car levels out and stays up while driving. I would like to request some information as to the causes of this as well as how to go about repairing the issue.(please note: this car is a right hand drive)

SpiritR230

no ABC light or warning? nothing?

Imijassat

It occurred once where it read :Stop, car too low -right after taking off and after pressing the suspension height button, the car leveled out immediately. Note that I only have the car for about a month.

Z_de_Suisse

Same problem than me, except I have more than one side. Did you notice some leaks on your strut ?

I went to Mercedes and the diagnostic was that the struts was to be replaced... 1'500€ each + labor here in Europe.

The reason is that the inside valves are letting the fluid pass and therefore the car goes down, so you don't necessarily need to replace them. I found a specialized workshop that can rebuild the suspensions, I go there next week, I'll see how it works.

CHADisBAD

mostly likely it is your rear valve block that needs to be rebuilt (like he^ said, leaky valve). this is very common (along with several other issues) once the ABC's get above 50k miles.

there are plenty of DIY right ups on here, and youtube has a video. the rear valve block is a ***** to work on, the front not so bad. search the forums, you will find what you need.

fxrs1955

Removing the rear valve block is tedious but it's not that technical. I would advise you to make sure the seats and faces are extremely clean when you reinstall the block. I replaced the rear accumulator on a 500 I owned and evidently left something on either a seat or face. It's no fun doing it twice.