Dash lights, no speedo, spoiler in up position and no cruise control are still a problem. Biggest problem for me is getting time to work on these. So far I have re-soldered contacts in RCU plus cleaned contact surface of relays. Removed cleaned and replaced as many connection blocks and earth cables as I can find. Removed and cleaned all 4 speed sensors etc. The car drives perfectly with no adverse effects on ABS. I am waiting for new speed sensors to arrive and am about to remove the o/s front wheel hub where I suspect the problem lies. When I took the sensor cable away from there I noticed a slight rub mark on the pickup end, this usually indicates a cracked reluctor ring. You can sometimes see a bright spot on the ring where it comes into contact with the speed sensor when it is cracked. Over time rust on the hub surface creeps under the reluctor ring which is a shrink fit, expands and cracks the ring. I have tried to locate a supplier but so far only come up with someone who can supply a new hub c. $500 I also tried to find the measurements of the ring, again no luck. That is why I am removing the hub, to remove the old ring, to obtain the measurements and get new rings made. I can do this here in UK. Does anybody know if Merc SLK320 has same front hubs?