General Information There are 9 test modes available which are indicated via the outside temperature display. The test mode number is indicated after the decimal point. Example: Test mode 1 "Fuel tank display", appears as , which means 80 liters and test mode 1. During test mode 2, "Momentary fuel consumption in liters per hour," consumption values of less than 9.9 l / h are shown multiplied by 10: Example: corresponds to 3.4 l / h - test mode 2. During an momentary consumption of greater than 10 l/h, the consumption and display are identical. This is indicated by a colon (:) in front of the display figures: Example: corresponds to 12 l / h - test mode 2. Note: The test values that are indicated during diagnostics in the outside temperature display correspond to metric units of measure. A direct comparison between analog and digital displays is not possible. A comparison is only broadly possible. Examples: Fuel tank reading: Analog in gallons, Digital in liters, Fuel consumption gauge: Analog in miles per gallon, Digital in liters per hour. Activation of Test Modes (displayed via outside temperature indicator window) Ignition: ON Depress center of clock adjusting knob "A" ( 23 Fig. 7) for at least 5 seconds and the first test mode display will appear in the outside temperature display window. Pull out clock adjusting knob "B" and turn clockwise ( 23 Fig. 7) to activate the next test mode. For each additional test mode, the clock adjusting knob "B" must be pulled out and turned again clockwise. Note: When the ignition is turned OFF, the test mode routine is canceled.

Notes: Prerequisite for test modes 2 - 4 Engine: at Idle To perform all 9 test modes, it is advisable to start the engine before activating the test modes.

Diagnostic Test Mode Identification

Test mode no.	Function/component	Digital readout (example)	Corresponds to:
1	Fuel tank contents in liters		80 liters
2	Momentary fuel consumption in miles per gallon		3.4 liter per hour 12 liter per hour
3	Engine oil pressure in bar		2.0 bar
4	Engine rpm (x 100)		4100 rpm
5	Engine oil level		0= Oil level OK 1= Oil level not OK
6	Activation of oil pressure, fuel consumption and fuel tank gauges		Needle in first quarter of gauge dial ( 23 , Figure 3)
7	Activation of oil pressure, fuel consumption and fuel tank gauges		Needle in second quarter of gauge dial ( 23 , Figure 4)
8	Activation of fuel consumption and fuel tank gauges		Needle in third quarter of gauge dial, the oil pressure gauge stays in second quarter of dial ( 23 , Figure 5).
9	Activation of fuel tank gauge		Needle in fourth quarter of gauge dial, oil pressure gauge remains in second quarter, fuel consumption gauge remains in third quarter of gauge dial. ( 23 , Figure 6)