I always do my own servicing and up to now have had no trouble re-setting the indicator using the button on the left side of the cluster. This time no joy. Anyone got any ideas? Is is a crafty device to make me take it in for services?
from mbguru.com said:W203 C Class, W209 CLK class reset service indicator.
--------------------------------------------------------------------------------
This applies to the Mercedes W203 C class and the Mercedes W209 CLK Class.
a) Turn ignition key to '1'
b) Press the system selection buttons (left hand edge of steering wheel) until you have the Basic display with mileage or temperature in the display
c) Press the dimming button (on the cluster itself) briefly 3 times and you see the voltage display on the cluster and a ping is heard
d) Turn the ignition key to '2'
e) Press the scroll down button and 'Service indicator' will appear in display
f) Press the dimming button and 'Oil Type' will appear on the cluster
g) Select oil type using +/- buttons and press the scroll up button to confirm.
h) Press and hold the dimming button until 'Service confirmed' appeard
i) Press scroll up until 'Service indicator' appears again
j) Press upper system selection button to finish.