First read and observe the introductory information
and safety warnings 

To use, place the removable ashtray in one of the drink holders in the front centre console or in the rear centre armrest   .
Opening and closing the ashtray
Emptying the removable ashtray
Introduction
Cigarette lighterRemoving and installing refrigerant shut-off valve for heater and air
conditioner unit -N541
Removing
–
Observe safety precautions
→ Chapter „Safety precautions when handling refrigerants“.
–
Comply with notes
→ Chapter „Working on refrigerant circuit“.
...
Checklist
Never carry out any work on the engine or in the engine compartment
if you are not familiar with the requisite procedures and general safety requirements,
or if you only have access to incorrect operating equipment, service fluids,
and unsuitable tools   . The work should be carried ou ...
Checking fuel pressure, engine code CWVA
Special tools and workshop equipment required
Removal wedge -3409-
Pressure tester -VAS 6550-
Connector cable -VAS 6550/3-3-
Connector cable -VAS 6550/3-4-
Vehicle diagnostic tester
...