Commercially available tools
P83.70-3357-06
1 Connect 4-pin test cable to the hand-held tester.
2 Setting in main menu: Multiplexer to "NO".
3 Connect connecting plug "Terminal 15" and "Terminal 30" to the positive battery terminal and connecting plug "Ground" to the negative battery terminal.
4 Connect connecting plug "Signal" to the test connector (11).
5 Always enter vehicle as Model 210, irrespective of actual vehicle model.
If a corresponding module is not available for the hand-held tester, see stages 7 and 8.
6 Select the menu AC/stationary heater/fault interlock with the hand-held tester.
The fault interlock can also be eliminated via the menu AC/stationary heater/fault interlock for retrofitted stationary heaters.
P83.70-3266-01
Eliminating the fault interlock by removing the heater fuse (B) in the engine compartment on the right-hand side.
Requirement:
The ignition and the heater must have been switched off for at least 2 minutes.
7 Remove heater fuse (B) for 10 seconds and reconnect
Heater is reset.
8 Switch on heater via timer switch (N34).
P83.70-2029-01
9 Remove heater fuse (B).
10 Wait 10 seconds, then switch off heater via timer switch (N34) and reconnect heater fuse (B).
Fault interlock will now be eliminated.
11 Switch off heater via timer switch (N34).