2011 Mercedes R-Class Owner's Manual - Page 168
2011 Mercedes R-Class Manual
Page 168 highlights
166 Refueling ! AdBlue® is not a additive and must not be added to the diesel tank. If AdBlue® is added to the diesel tank this could damage the engine. i If you are adding between maintenance intervals, add approximately 1 gallon (3.8 l) of AdBlue® to the AdBlue® tank. 1 gallon (3.8 l) of AdBlue® is approximately 2 AdBlue® refill bottles. Further information about AdBlue®(Y page 353). The AdBlue® filler neck is under the luggage compartment floor. X Switch off the ignition. X Open the tailgate. X Lift the luggage compartment floor (Y page 294). X Turn AdBlue® filler cap ; anti-clockwise and open it. Filler cap ; is secured with a plastic strap. Turn AdBlue® filler cap ? anti-clockwise and open it. Filler cap ? is secured with a plastic strap. X Driving and parking X X Unscrew the covering cap from AdBlue® refill bottle A. Place AdBlue® refill bottle A on the filler neck as shown and screw on clockwise hand-tight. ! Only screw on the AdBlue® refill bottle hand-tight. It could otherwise be damaged. X Press AdBlue® refill bottle A down. The AdBlue® tank is filled. This may take up to one minute. X X Remove wheel bolt wrench ; and ratchet ring spanner = if applicable. Turn AdBlue® cap : anti-clockwise and remove it. i If the AdBlue® refill bottle is no longer pressed down, the filling process stops and the partially emptied bottle can be removed. X X Release AdBlue® refill bottle A. Turn AdBlue® refill bottle A anti-clockwise and remove it. X Place AdBlue® filler cap ? on the filler neck and turn it clockwise.