My 500SL rides like a buckboard. Crunch in R rear and lite is on. Traced the wires and all good. Oil level ok. Suspect ADS control module or accumulators. Any suggestions?

are you sure its the suspension? i have same problems before on R cracking noise is heard under. it was caused by a bad transmission. i checked the solenoid valve and shift pressure shift valve. better have it checked by a benz scanner for thorough examination. good luck