Hi, I am new to this forum and from what I have seen this is great.
My turn to pick your brains, if you don't mind.
I have a 1998 C-280 Sport, with 57,000 miles, which I have recently purchased second hand. Brought it in to a local independent shop for a "check engine" light.
The problem keeps coming back. The codes are "170' and "173", also with a note about a problem on the left bank. Not too sure what the tech told me.

Can one of you top dogs help with suggestions of what the problem could be? (I'm afraid the shop doesn't really know what the problem is)

Thanks in advance for your help, appreciate it greatly.

Andre