Warning: Individual characteristics are also given in the text of the Chapter and, if mandatory, are highlighted in bold
Gasoline engines | |
All models except those equipped with 132 kW motors (AJQ):
Unleaded gasoline is not worse than AI-95 It is allowed to use unleaded gasoline not worse than AI-91, while engine power is reduced. Models with 132 kW motors (AJQ): Unleaded gasoline is no worse AI-98. It is allowed to use unleaded gasoline not worse than AI-95, with this reduces engine power. | |
Diesel engines | |
Diesel fuel | |
according to DIN EN1) 590 | Cetane number not less than 49 |
Biodiesel | |
according to E DIN 51 606 | RME (vegetable oil methyl ester) |
Almost no sulfur. Therefore, during the combustion of RME, there are almost no
sulfur dioxide emission (S02). Exhaust gases contain less: – carbon monoxide, – hydrocarbon, - soot. There may be a slight decrease in power and an increase in consumption fuel. In the cold season, mainly fill with diesel fuel. Allowed application of RME at temperatures down to -10°C. At temperatures below -10°C, diesel fuel should be added in a ratio of 1: 1 to prevent PME from clotting. In winter conditions When using the summer version of diesel fuel at temperatures below 0°C, there may be interruptions in the operation of the engine, which is explained by thickening fuel as a result of the release of paraffin. Therefore, apply "winter" diesel fuel. Depending on the brand of winter fuel ensures uninterrupted operation at temperatures from -15°С to -22°С. Do not add gasoline to diesel fuel, etc. thinners. If the fuel quality is poor, removing water from the fuel filter sump may need to produce more frequently than scheduled THAT. To remove water, unscrew the screw plug at the bottom of the filter by hand. The accumulation of water in the filter can lead to engine malfunctions. | |
Fuel tank | |
Volume 55 l or 62 l on models with all-wheel drive including reserve stock | 8 l |
Petrol injection system | |
1.6 AEH | Simos 2.1/Simos 2.2 |
1.8 AGN | Motronic 3.8.5 |
1.8 AQA | Motronic ME7.5 |
1.8T AGU | Motronic 3.8.3 |
Diesel injection system | Electronic with direct injection, turbocharging and supercharged cooling air |
idle speed, rpm | |
AEH | 760 – 880 |
AGN | 760 – 840 |
AGU, AQA | 800 – 920 |
AJQ, APY | |
1.9 TDI | 875 – 950 |
The content in the exhaust gases at idle | |
CO, % | Max. 0.5 |
HC, ppm | 100 |
CO2, % | 14.5 – 16.0 |
CO2, % | 0.1 – 0.5 |
CO content at 2500 - 2800 rpm, % | 0.3 |
lambda value | 0.97 – 1.03 |
Max RPM, rpm | |
AEH | 6350 |
AQA, AGN, AGU | 6800 |
Other petrol engines | 6500 |
TDI (AGR, ALH) | 4900 – 5100 |
TDI (AHF) | 4800 – 5200 |
Adjusting the idle speed and speed limit rotations for maintenance are not required. | |
Fuel pressure control | |
Fuel pressure, bar at idle and | |
attached vacuum hose | 2.5 |
removed vacuum hose | 3.0 |
10 minutes after stopping (at 20°C) | 2.0 |
Injectors | |
Injection volume for 30 s, ml | |
AGN | 85 – 105 |
AGU | 110 – 130 |
AQA | 133 – 157 |
Injector resistance (at 20°C), Ohm | |
AGN, AGU | 12 – 15 |
AQA | 12 – 17 |
AEH | 14 – 17 |
Coolant temperature sensor resistance, Ohm/°С | 275 – 375 / 80 |
RPM/TDC sensor resistance, Ohm | 450 – 1000 |
Lambda probe heater resistance, Ohm | 1 – 5 |
nozzles | |
fuel injection pressure | |
New nozzles, bar | 190 – 200 |
Wear limit, bar | 170 |
Resistance | |
Engine speed sensor between pins 1 and 2, kOhm | 1.0 – 1.5 |
Brake/Stoplight Pedal or Clutch Pedal Switch, Ohm | |
Pedal pressed | open |
The pedal is not depressed less | 10 |
Needle movement sensor (at the nozzle of the 3rd cylinder), Ohm | 80 – 120 |
Diesel turbocharger boost pressure | |
Release models after 02.94 | |
When driving in 3rd gear at a speed of 40 km / h, completely squeeze the gas. When the speed reaches 80 km / h, the pressure should be | 1.50 - 1.65 bar |
Release models since 03.94 | |
Disconnect the pressure control solenoid valve. When driving in 3rd gear at 1500 rpm. fully squeeze out the gas. Upon reaching 3000 rpm, the pressure should be | 1.55 - 1.75 bar |
Tightening torques for threaded connections | |
Fastener tightening torques are also given in the text of the Chapter and on
some illustrations*. *Tightening torques in bold type are subject to exact compliance; Efforts not in bold are indicative only | |
Hall sensor on the cylinder head | 10 Nm |
Intake pipe to cylinder head | |
Gasoline engines | 10 Nm |
Diesel engines | 25 Nm |
Exhaust manifold on cylinder head | 25 Nm |
Clamp connections | 40 Nm |
Oxygen sensor to catalytic converter | 50 Nm |
Other bolted/flange connections | 25 Nm |
Downpipe to exhaust manifold/turbocharger (benz.) | 40 Nm |
Downpipe to exhaust manifold/turbocharger (diesel) | 25 Nm |
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