Opel Speedster Operation, Safety, Maintenance Manual page 54

All checks and setting work should therefore
be left to an Authorised Opel Dealer which has
suitable equipment and trained personnel
available. Electronic testing systems
rapid diagnosis and remedying of faults.
You are thereby making an important
contribution towards keeping the air clean
and compliance with emissions legislation.
Checking and adjustment of the mixture
formation system and ignition system forms
part of the Service Plan. For this reason you
should have all maintenance
at the intervals specied in your Service
Booklet.
permit
work carried out
53