04 E500 coilovers/springs
Why?
If you're just looking to lower the car, there are a few options. Search the W211 sub forum.
1. Lowering links - They move the ride height sensor, tricking the car into thinking it's sitting higher than it really is. The airmatic systems compensates by lowering the car. Problem here is, since the airmatic system thinks it's riding at oem height, damping is not adjusted accordingly. Cost - 275.00
2. SDS lowering at dealer or a STAR equipped independent shop. - Car is lowered using the SDS computer, on an alignment rack. Lowering this way is better than #1 because the car knows what height it's riding at and adjusts damping accordingly. It's also performed on an alignment rack so the negative camber associated with lowering a car is minimized. Downside is, the lowering is only about 1" or so. Cost - $250.00, IF you can find a dealer to do it. Most of them deny that it can be done.
3. Electronic lowering module. This is the best of both worlds. If you choose a module like the RENNtech ELM. Ride height is fully adjustable and you can lower the car on the fly. Computer knows about the lowering, so damping is adjusted accordingly. You can get very low, or go back to stock height with the turn of a knob. Downside is cost. They're close to $1500.00 new, but routinely show up in the classified's on this site for $600-900.00, depending on what version of ELM.
I've used all 3 methods between all of my cars. Currently, my E500 and SL600 are lowered via SDS.
If you search my posts, you can find pictures of my E500 lowered with the RENNtech ELM.
There is actually a 4th way to lower an airmatic car, but I declined to list it for safety reasons. The total cost is about $1.00, yes ONE DOLLAR, but I won't endorse this method. If you're interested, search the W211 sections for "washer method" or "washer lowering"



