Ok, so huge temperature drop in Chicago last night from 70F down to below 30F. I started my beloved S600 and "ABC visit workshop" message showed on screen, this happened very conveniently for me a week after my extended warranty expired.

I drove for about a mile and drove back, started the car again and now ABC "drive carefully" , showed in red. The car won't raise up and down also. Then the light turned back to "ABC visit workshop"

The car has new ABC pump installed at 70k miles(now 86k) all hydraulic shocks are replaced, as well as pressure hoses etc.
There is no apparent leaks and the car sits at normal height.
Any input is appreciated.
Oh, also as of this morning its not blowing hot air any more.

 

Check the fluid level in both ABC resevoirs? When you had the pump replaced, did they use the proper pentosin fluid? Just thoughts on what would affect it in the cold.

As far as the no hot air, possibly a bad duovalve? I had to replace mine last winter.

 

I'm pretty sure they did since it was done at the dealer. Thank you for the input. I had it towed to the dealership this morning for diagnostics so I will report back shortly.

 

Dealer says, diagnostics showed all shocks with faulty codes and front right shock shows no voltage.They said codes are stored and couldn't be erased. Then they disconnected the front right shock and were able to clear the other three codes, but the codes remains for the front right shock. So the verdict is I need a new front shock.
Different dealer did all four shock year and a half ago at around 70k miles, I wonder if I call them if they will give me a discount for it at least.
And I need a duovalve for the heating problem.
Any suggestions for discounted prices online?