abc control

Hi folks, I have a 2001 CL500 and I recently had the red ABC warning light. I took it to Mercedes and they charged an hours labour for diagnostics. They came back to me and said the ABC control module blew up. They even showed me a picture of a burned terminal. They wanted 1500 euro for parts...

I have had worsening ABC "visit workshop" messages until now, it will come up when stationary. Only twice (just recently) has it moved on to "too low" and in both cases the up/down wouldnt work and there was a sound underneath (or forward/nearside) that sounded like a blown silencer and was...