Recently purchased a '95 C280 that has constant "check engine light". Independent dealer says needs a new computer/repair. Authorized dealer wants $1300 for a new comp. Would like to know cheapest/best way to get the computer repaired. Since car runs great (81k) don't see need for new one unless repairs are "impossible" which seems unlikely since it is not fried. Authorized dealer told my indep. dealer that he could not swap comp. with a '96 C280 due different climate control system. Thanks