Volkswagen PASSAT 2013 Manual page 379

LED Light Emitting Diode
m Meter, metric unit of measure for length
MFI Multi-Function Indicator
Nm Newton meter - engine torque unit
RON Research Octane Number, measurement of anti-knock resistance of gasoline
rpm Engine revolutions per minute (engine speed)
SAE Society of Automotive Engineers
SRE Manifold injection
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TDI Turbocharged Direct Injection (Turbocharged diesel engine with direct fuel injection)
XDL Extensions of the Electronic Differential Lock system.