Uky
Active Member
- Joined
- Jun 23, 2006
- Messages
- 296
- Car
- C238 AMG
Posted this on a U.S. Forum.
No response....
Took my CL500 (C215) for a spin today. When reaching the start of the highway after more than 12km driving at speeds between 50 and 90 km/h (no "shoes") I started feeling vibrations at 100 km/h that got worse and worse
. This on a road that is perfectly flat and recently had new asphalt. Something like a tire beginning to flatten or a loose rim. I realized that I had to stop and made an exit after about 2 km or so after having reduced the speed down to 50 km/h. The vibrations was almost gone so I decided to try to recreate the problem. Up on the highway again. No vibrations (!) Off the highway a few kilometres later and then driving on small roads where I could barely feel the vibrations. After slowing down and breaking at a roundabout I took another highway home. This time I could not recreate the problem.
Drove at 120 km/h for 15 km. Nothing! It was like sitting in the cockpit in a big airliner flying at 30.000 feet in calm air.
I replaced the battery only an hour or so before hitting the road, and I have calibrated the BAS/ESP by rotating the steering wheel fully counter clockwise and fully clockwise, thus putting the "ABS/ESP Failure - Visit Workshop" warning off.
On an empty road I tried to provoke the system by harsh zig-zag driving, up and down speed bumpers but to no avail. No error messages. No squeek or rattle. Rims are tightened and air pressure is to mfr specifications. ABC oil recently changed. Level OK.
I drove 20 miles back home in different speeds. Everything was OK.
Does the ABC system also require calibration for different speeds and on different surfaces in order to adopt and set the servo loop constants necessary for the chassis? If it is a self learning system I can understand why it behaved like this. Is it a bad sensor of some kind? As I wrote above: "No Malfunction" when scrolling the instrument cluster screens...
Any clues?
No response....
Took my CL500 (C215) for a spin today. When reaching the start of the highway after more than 12km driving at speeds between 50 and 90 km/h (no "shoes") I started feeling vibrations at 100 km/h that got worse and worse
I replaced the battery only an hour or so before hitting the road, and I have calibrated the BAS/ESP by rotating the steering wheel fully counter clockwise and fully clockwise, thus putting the "ABS/ESP Failure - Visit Workshop" warning off.
On an empty road I tried to provoke the system by harsh zig-zag driving, up and down speed bumpers but to no avail. No error messages. No squeek or rattle. Rims are tightened and air pressure is to mfr specifications. ABC oil recently changed. Level OK.
I drove 20 miles back home in different speeds. Everything was OK.
Does the ABC system also require calibration for different speeds and on different surfaces in order to adopt and set the servo loop constants necessary for the chassis? If it is a self learning system I can understand why it behaved like this. Is it a bad sensor of some kind? As I wrote above: "No Malfunction" when scrolling the instrument cluster screens...
Any clues?