Mercedes-Benz offers some of the most desirable used cars in Ireland — and some of the most expensive to fix when neglected. The W204/W205 C-Class, W212/W213 E-Class, and GLC are outstanding when bought with full dealer history. The OM651 diesel chain, 7G-Tronic fluid neglect, Airmatic suspension, and COMAND electronics are the four areas where money disappears. Service history is not optional — it is the purchase.