The Mercedes-Benz B-Class (W245) is a premium compact MPV introduced in 2005. It shares its unique 'sandwich floor' architecture with the A-Class (W169). This design places the engine and transmission at a sharp angle, allowing them to slide underneath the passenger cabin in the event of a frontal collision. While this provides excellent safety, a high seating position, and remarkable interior space for its footprint, it makes engine bay access notoriously difficult and expensive for repairs. The W245 received a mid-cycle facelift in 2008, which brought crucial improvements to rust protection, interior materials, and the introduction of 'BlueEFFICIENCY' models. While the petrol engines (M266) are mechanically robust, the vehicle's overall reliability is heavily compromised by the fragile '
The Mercedes-Benz B-Class W245 is a brilliant packaging concept ruined by the realities of maintenance. While the petrol engines (B170/B180/B200) are mechanically solid, the sandwich floor design means that when a simple auxiliary part like a starter motor fails, the labor bill will easily exceed the value of the car. Furthermore, the Autotronic CVT is a ticking time bomb if not meticulously maintained. Buying Advice: If you must buy a W245, strictly look for a post-2008 facelift model (to avoid rust), with a manual transmission, and a naturally aspirated petrol engine (B180 or B200). Avoid the CVT automatic and the louvered sunroof at all costs. Ensure the starter motor and AC compressor have already been replaced by the previous owner.