01-01-0001:
If water pump retaining bolts work loose (which can happen) it's an engine out job to get at them.
16-04-2010:
First report of failure of Autotronic CVT autobox in an A or B Class received. Car was a B200CDI SE auto, purchased 14-7-2006, mileage 43,000. Quoted £5,355 AFTER a 25% contribution from Mercedes. (Possibly same ZF CF23 CVT at the Forc C-Max and Focus 1.6TDCI auto?)
Diesel engines used for repeated short runs from cold are prone to problems with the glowplugs that corrode into the cylinder head due to condensation.
Driveshaft problems emerging at around 5 years old.
18-08-2011:
Autotronic CVT valve bodies are starting to fail after 6 years and around 70k miles. Cost £1,250 to replace.
02-08-2012:
A/c condensers vulnerable to stone damage.
16-03-2014:
If bulkhead vent wells get blocked on a 2005-2012 B-Class, then the battery compartment also floods and, of course, the pollen filter will become sodden. These are £27 from a parts factor.
19-03-2015:
On 2005-2012 Mercedes B Class, seals around cabin vent flaps fitted between the load area and the sides of the bumper valences fail, leading to spare wheel well filling with water. A possible DIY fix once you buy the seals.
12-12-2016:
Repeat failure of EIS ignition switch module in 2011 Mercedes B200. Went dead and car would not start. EIS replaced at cost of £500. Then went deradf again and MB dealer at a loss how to fix. This link explains: http://www.ogsmechanics.com/tutorials-view/mercedes-eis-ezs-immobiliser-key-module/
04-09-2017:
Report of CVT transmission trouble in a 2011 Mercedes Benz B Class, this one at 30,000 miles. Has full MS service history. Automatic transmission went into racing mode, described by the mechanics as "a secondary speed sensor defect". The repair price quoted was £1,576.89, reduced to £1,439.68.
25-03-2018:
Report of Autotronic CVT of 2010 Mercedes Benz B-Class failing at 62,000 miles. Replacement cost quoted by MB dealer £4,200.
28-03-2018:
Historical report of water ingress to load area and spare wheel well of Mercedes Benz B Class. It had been coming in via broken one-way cabin vents between the load area and the rear bumper valence extensions. MB Guildford took 9 days to strip the load area and replace the vents. Customer eventually paid £1,200. (The vents could have been broken by rats chewing their way through to get at anything they thought might be edible in the load area.)
03-12-2019:
Report of engine air intake of 2009 Mercedes Benz 1.5 B160 Blue Efficiency (petrol) "blowing up" in France. Took 8 weeks to repatriate the car.
February 2005
Mercedes-Benz B-Class unveiled
Sits in between A Class and C Class. 4,270mm long x 1,777mm wide by 1,604mm high. Long wheelbase of 2,778mm gives generous rear legroom.
Same sandwich floor construction as A Class. Same parabolic rear suspension as 2nd generation A Class. Same engine range as A Class with 200 Turbo from the start. 5 or 6 speed manual transmissions or Autotronic 7 ratio CVTs available with all engines. Rear seats fold flat easily without removing headrests. Plenty of room in the back.
July 2008
B-Class revised
For Spring 2008 Mercedes overhauled the design and engineering of the B-Class. The facelift focused on environmental compatibility, economic efficiency and comfort. Engines now burn up to seven percent less fuel than previously with low exhaust emissions.
Mercedes-Benz has developed a new ECO start/stop function for the B 150 and B 170 models. This switches off the engine when stopped at traffic lights, for example, producing a fuel saving of up to nine percent in practical use. Additional new developments include active parking assist which helps drivers to both find a suitable parking spot, and then manoeuvre into it.