Hello Forum Friends;
My 1994 MB e420 w/238,436 miles FAILED State Emissions Test Today.....
Car Runs very good, Smooth idle ; No misses; quick throttle response and No visible/smoke exhaust.
Please advise on what the included Emission Test Failure Data Requires me to correct to PASS .....

Test Parameter ... Result .... Additional Information if available

Idle Speed CO ... 8.56 % ... GREATER THAN 1.20 %
High Speed CO ... 4.40 % ... GREATER THAN 1.20 %
Idle Speed HC ... 623 ... GREATER THAN 220 parts per million
High Speed HC ... 373 ... GREATER THAN 220 parts per million

.....Please Help /Advise on items Needing Attention for a Passing Test
THANKS ; In advance for All Replies!!!! Chance