When the outside temperature is low, the display in the instrument cluster may take slightly longer to appear than it does when the outside temperatures is higher.
Additional information and warnings:

WARNING
Instruments
Instrument overviewRefrigerant Circuit, Tracing Leaks, with Leak Detection System -VAS6196- or
Leak Detection Kit -VAS6201A- or Succeeding Model
Note
This repair manual describes different methods for detecting
leaks in the refrigerant circuit. These methods have been tested
and result in success when used correctly.
If when searching for compressed air / Nit ...
Test Requirements
Radiator and condenser are clean (clean if necessary).
The ribbed belt for the A/C compressor and alternator
tensioned correctly.
All air ducts, covers and seals are OK and installed
correctly.
...
Fold Corrosion Servicing Notes
Corrosion on the Fold Edges, for Instance on the Hood, Door
or also the Rear Lid
–
Remove the corroded areas with
→ Chapter „Pneumatic Brush Grinder Set -VAS6446-“ or
→ Chapter „Brush Grinder Set ...