As we had some winter weather recently, I switched to "W" mode on my 97 C230. I also determined that 2nd gear starts more closely match my in-town driving style than do a 1-5 gear change between every stoplight. Is there a problem with continued use of the "W" mode and lack of 1st gear usage? If I would like to drive in this mode, how often should I switch back to "S" and for how long, assuming lack of use would be the equivalent to not using your AC compressor all winter.