Hello Suginami and 97 SL320,

I will look the wiring harness over carefully and either tape it or replace it as it has not been replaced by me and I bought the car back in 2007.

I will try resetting the codes and see what I come up with afterwards. Do you know how long it takes for the codes to become readable again?

I read somewhere that an easy way to test for (I am not sure which intake or exhaust, probably exhaust?) intake or exhaust leaks is to spray with something (not sure what as I had never heard of the product, I figure it is some kind of penetrating oil like WD-40, I think it is called CIS Spray?) and look for bubbles. Well, I don't always believe everything I read; have either of you ever heard or know of something like that?

I am pretty sure that the caliper is frozen. I will check for vacume leaks and I read about a procedure for a M103 engine. Do you know if it would be a similar procedure for the M104? I figire I need to begin by removing the caliper and take it from there.

Thanks for your input. I look forward to hearing from you again.

Regards,

Henry