2008-2014 Mercedes-Benz C63 AMG W204 Labor Times
6.2L V8 M156 - 571 labor times available
body
- Bed Rail Cap1.4 hrs
- Bedside Panel6.8 hrs
- Bumper Cover - Front2 hrs
- Bumper Cover - Rear2 hrs
- Bumper Reinforcement - Front2.7 hrs
- Bumper Reinforcement - Rear2.7 hrs
- Door Check/Stop0.7 hrs
- Door Glass2 hrs
- Door Handle - Exterior1.4 hrs
- Door Handle - Interior1.1 hrs
- Door Hinge2 hrs
- Door Shell4.1 hrs
- Door Skin5.4 hrs
- Door Weatherstrip1.4 hrs
- Fender2.7 hrs
- Fender Liner0.7 hrs
- Grille0.7 hrs
- Hood2 hrs
- Hood Hinge1.4 hrs
- Hood Latch0.7 hrs
- Hood Release Cable1.4 hrs
- Hood Strut0.4 hrs
- Liftgate2.7 hrs
- Liftgate Motor2 hrs
- Liftgate Strut0.7 hrs
- Quarter Glass2 hrs
- Quarter Panel8.1 hrs
- Rear Window2.7 hrs
- Rocker Panel5.4 hrs
- Side Mirror Glass0.7 hrs
- Tailgate2 hrs
- Tailgate Cable0.7 hrs
- Tailgate Handle1.1 hrs
- Tonneau Cover Install1.4 hrs
- Truck Bed Liner2.7 hrs
- Trunk Hinge1.4 hrs
- Trunk Latch1.1 hrs
- Trunk Lid2 hrs
- Trunk Strut0.4 hrs
- Vent Glass1.4 hrs
- Windshield2.7 hrs
- Windshield Molding1.4 hrs
brakes
- ABS Module2.7 hrs
- ABS Pump3.4 hrs
- ABS Tone Ring2 hrs
- ABS Wheel Speed Sensor - Front1.1 hrs
- ABS Wheel Speed Sensor - Rear1.1 hrs
- Brake Bleed - All Four1.4 hrs
- Brake Booster3.4 hrs
- Brake Booster Check Valve0.4 hrs
- Brake Caliper - Front1.4 hrs
- Brake Caliper - Rear1.4 hrs
- Brake Caliper Bracket1.6 hrs
- Brake Caliper Rebuild - Front2 hrs
- Brake Caliper Rebuild - Rear2 hrs
- Brake Caliper Slide Pins0.7 hrs
- Brake Drum - Rear0.7 hrs
- Brake Fluid Flush1.1 hrs
- Brake Hose - Front1.1 hrs
- Brake Hose - Rear1.1 hrs
- Brake Light Switch0.7 hrs
- Brake Line - Single1.4 hrs
- Brake Lines - Complete Set5.4 hrs
- Brake Master Cylinder2 hrs
- Brake Pads - Front1.1 hrs
- Brake Pads - Rear1.2 hrs
- Brake Pads and Rotors - Front1.6 hrs
- Brake Pads and Rotors - Rear1.8 hrs
- Brake Proportioning Valve1.4 hrs
- Brake Rotor - Front Single1.1 hrs
- Brake Rotor - Rear Single1.1 hrs
- Brake Rotors - Front Pair1.4 hrs
- Brake Rotors - Rear Pair1.4 hrs
- Drum Brake Hardware Kit1.4 hrs
- Drum Brake Shoes - Rear2 hrs
- Electronic Parking Brake Motor2.7 hrs
- Parking Brake Actuator2.7 hrs
- Parking Brake Cable2 hrs
- Parking Brake Shoes2 hrs
- Wheel Cylinder1.4 hrs
cooling
- Coolant Bypass Pipe2 hrs
- Coolant Flush1.4 hrs
- Coolant Overflow Tank0.7 hrs
- Coolant Reservoir0.7 hrs
- Coolant Temperature Sensor0.7 hrs
- Cooling Fan Assembly1.4 hrs
- Cooling Fan Clutch1.4 hrs
- Cooling Fan Motor2 hrs
- Cooling Fan Relay0.4 hrs
- Engine Oil Cooler2.7 hrs
- Heater Control Valve1.1 hrs
- Heater Core8.1 hrs
- Heater Hoses1.4 hrs
- Radiator2.7 hrs
- Radiator Cap0.3 hrs
- Radiator Hose - Lower1.1 hrs
- Radiator Hose - Upper0.7 hrs
- Radiator Hoses - Both1.4 hrs
- Thermostat1.4 hrs
- Thermostat Housing1.6 hrs
- Transmission Oil Cooler2 hrs
- Water Outlet/Thermostat Housing1.4 hrs
- Water Pump3.4 hrs
drivetrain
- 4WD Actuator2 hrs
- Axle Seal - Front2.7 hrs
- Axle Seal - Rear2 hrs
- Axle Shaft - Rear2 hrs
- CV Axle - Front1.4 hrs
- CV Axle - Rear1.6 hrs
- CV Axles - Front Pair2.4 hrs
- CV Boot - Inner2 hrs
- CV Boot - Outer2 hrs
- Differential Cover Gasket1.1 hrs
- Differential Fluid Change0.7 hrs
- Differential Fluid Change - Front0.7 hrs
- Differential Fluid Change - Rear0.7 hrs
- Differential Pinion Seal2.7 hrs
- Differential Rebuild - Front8.1 hrs
- Differential Rebuild - Rear8.1 hrs
- Driveshaft2 hrs
- Driveshaft - Front2 hrs
- Driveshaft - Rear2 hrs
- Driveshaft Center Support Bearing2 hrs
- Front Differential5.4 hrs
- Limited Slip Clutch Pack5.4 hrs
- Locking Hub - Auto2 hrs
- Locking Hub - Manual1.4 hrs
- Rear Differential5.4 hrs
- Ring and Pinion6.8 hrs
- Transfer Case5.4 hrs
- Transfer Case Chain5.4 hrs
- Transfer Case Encoder Motor2 hrs
- Transfer Case Fluid Change0.7 hrs
- Transfer Case Motor/Actuator2 hrs
- U-Joint1.4 hrs
- Wheel Bearing - Press-In Front2.7 hrs
- Wheel Bearing - Press-In Rear2.7 hrs
- Wheel Bearing Hub - Front2 hrs
- Wheel Bearing Hub - Rear1.6 hrs
- Wheel Hub - Front2 hrs
- Wheel Hub - Rear1.6 hrs
- Wheel Studs1.1 hrs
electrical
- Airbag - Driver1.4 hrs
- Airbag - Passenger2 hrs
- Airbag - Side2.7 hrs
- Airbag Module/Computer1.4 hrs
- Alternator2 hrs
- Alternator Belt0.7 hrs
- Amplifier2 hrs
- Antenna0.7 hrs
- Backup Camera1.4 hrs
- Battery0.4 hrs
- Battery Cable - Negative0.7 hrs
- Battery Cable - Positive0.7 hrs
- Battery Cables - Both1.1 hrs
- Battery Terminal0.4 hrs
- Blower Motor2 hrs
- Blower Motor Control Module1.4 hrs
- Blower Motor Resistor1.1 hrs
- Clock Spring2.7 hrs
- Combination Switch2.7 hrs
- Dimmer Switch2 hrs
- Door Lock Actuator - Front2 hrs
- Door Lock Actuator - Rear2 hrs
- Fog Light Assembly1.1 hrs
- Fog Light Bulb0.4 hrs
- Fuel Pump Relay0.4 hrs
- Fuse Box - Engine Bay2.7 hrs
- Fuse Box - Interior2 hrs
- Headlight Assembly1.4 hrs
- Headlight Assembly - Pair2.4 hrs
- Headlight Bulb - Single0.4 hrs
- Headlight Bulbs - Pair0.7 hrs
- Headlight Switch1.4 hrs
- Heated Seat Module1.4 hrs
- HID Ballast1.4 hrs
- Horn0.7 hrs
- Horn Relay0.3 hrs
- Instrument Cluster2 hrs
- LED Headlight Module2 hrs
- Main Relay0.7 hrs
- Power Antenna Motor1.4 hrs
- Power Mirror Motor1.4 hrs
- Power Seat Motor2 hrs
- Power Window Motor - Front2 hrs
- Power Window Motor - Rear2 hrs
- Power Window Regulator - Front2 hrs
- Power Window Regulator - Rear2 hrs
- Radio/Head Unit1.4 hrs
- Relay - Generic0.3 hrs
- Seat Heater Element2.7 hrs
- Side Mirror Assembly1.1 hrs
- Speaker - Dash0.7 hrs
- Speaker - Door1.1 hrs
- Speedometer2 hrs
- Speedometer Cable1.4 hrs
- Starter2.4 hrs
- Starter Solenoid2.7 hrs
- Subwoofer1.4 hrs
- Sunroof Motor2.7 hrs
- Sunroof Switch0.7 hrs
- Tail Light Assembly0.7 hrs
- Tail Light Bulb0.3 hrs
- Third Brake Light0.7 hrs
- Trunk/Liftgate Actuator1.4 hrs
- Turn Signal Bulb - Front0.3 hrs
- Turn Signal Bulb - Rear0.3 hrs
- Turn Signal Switch2 hrs
- Voltage Regulator1.4 hrs
- Washer Pump0.7 hrs
- Washer Reservoir1.1 hrs
- Window Motor and Regulator - Front2.4 hrs
- Window Motor and Regulator - Rear2.4 hrs
- Wiper Linkage2 hrs
- Wiper Motor - Front2 hrs
- Wiper Motor - Rear1.4 hrs
- Wiper Switch1.4 hrs
- Wiper Transmission2 hrs
engine
- Boost Pressure Sensor0.7 hrs
- Camshaft Position Sensor1.4 hrs
- Camshaft R&R10.8 hrs
- Connecting Rod Bearings20.2 hrs
- Crankshaft Position Sensor1.4 hrs
- Crankshaft R&R27 hrs
- Cylinder Head R&R8.1 hrs
- Cylinder Head Resurface10.8 hrs
- Engine Mount - Front2 hrs
- Engine Mount - Rear2 hrs
- Engine Mounts - All5.4 hrs
- Engine R&R13.5 hrs
- Engine Rebuild33.8 hrs
- Exhaust Manifold4.1 hrs
- Exhaust Manifold Gasket3.4 hrs
- Flexplate6.8 hrs
- Flywheel6.8 hrs
- Freeze Plug - Single4.1 hrs
- Freeze Plugs - All10.8 hrs
- Front Main Seal5.4 hrs
- Harmonic Balancer2.7 hrs
- Head Gasket - Single25.9 hrs
- Head Gaskets - Both24.3 hrs
- Idle Air Control Valve1.1 hrs
- Idler Pulley1.1 hrs
- Intake Manifold4.1 hrs
- Intake Manifold Gasket5.7 hrs
- Intercooler2.7 hrs
- Knock Sensor2.7 hrs
- Lifter - Single5.4 hrs
- Lifters/Tappets - All8.1 hrs
- Long Block Replacement16.2 hrs
- Main Bearings24.3 hrs
- Manifold Absolute Pressure Sensor0.7 hrs
- Mass Air Flow Sensor0.4 hrs
- Oil Level Sensor1.1 hrs
- Oil Pan Gasket5.4 hrs
- Oil Pan Replacement6.1 hrs
- Oil Pressure Sensor0.7 hrs
- Oil Pump8.1 hrs
- PCV Valve0.4 hrs
- Piston - Single24.3 hrs
- Piston Rings - All27 hrs
- Pistons - All29.7 hrs
- Rear Main Seal6.8 hrs
- Rocker Arms - All4.1 hrs
- Serpentine Belt0.7 hrs
- Serpentine Belt Tensioner1.4 hrs
- Short Block Replacement20.2 hrs
- Supercharger10.8 hrs
- Throttle Body1.4 hrs
- Throttle Position Sensor0.7 hrs
- Timing Belt5.4 hrs
- Timing Belt Kit6.8 hrs
- Timing Belt Tensioner5.4 hrs
- Timing Chain16.2 hrs
- Timing Chain Guide9.5 hrs
- Timing Chain Kit12.2 hrs
- Timing Chain Tensioner8.1 hrs
- Transmission Mount1.4 hrs
- Turbo Wastegate Actuator2.7 hrs
- Turbocharger8.1 hrs
- Valve Adjustment2.7 hrs
- Valve Cover Gasket - Single3.6 hrs
- Valve Cover Gaskets - Both3.4 hrs
- Valve Job - Complete13.5 hrs
- Valve Seals10.8 hrs
- Valve Spring - Single4.1 hrs
- Valve Springs - All8.1 hrs
- Variable Valve Timing Actuator4.1 hrs
- VVT Solenoid - Single1.4 hrs
- VVT Solenoids - All2.7 hrs
exhaust
- Air Injection Check Valve1.1 hrs
- Catalytic Converter - California2 hrs
- Catalytic Converter - Direct Fit2 hrs
- Catalytic Converter - Universal2.7 hrs
- DEF Injector2 hrs
- DEF Tank2.7 hrs
- Diesel Particulate Filter4.1 hrs
- Downpipe2.7 hrs
- DPF Delete Pipe2.7 hrs
- EGR Cooler4.1 hrs
- EGR Tube2 hrs
- EGR Valve1.4 hrs
- Exhaust Clamp0.4 hrs
- Exhaust Gasket - Front1.4 hrs
- Exhaust Gasket - Rear1.1 hrs
- Exhaust Hangers0.7 hrs
- Exhaust Manifold4.1 hrs
- Exhaust Manifold Gasket2.7 hrs
- Exhaust Manifold Studs4.1 hrs
- Exhaust Pipe - Front Section2 hrs
- Exhaust Pipe - Rear Section1.4 hrs
- Exhaust Tip0.4 hrs
- Flex Pipe2 hrs
- Front Pipe2 hrs
- Intermediate Pipe1.4 hrs
- Muffler1.4 hrs
- O2 Sensor - Downstream0.7 hrs
- O2 Sensor - Upstream0.7 hrs
- O2 Sensors - All2 hrs
- Resonator1.4 hrs
- SCR Catalyst4.1 hrs
- Secondary Air Injection Pump2 hrs
- Tail Pipe0.7 hrs
fuel
- Charcoal Canister1.4 hrs
- EVAP Canister Vent Solenoid1.1 hrs
- EVAP Purge Valve1.1 hrs
- EVAP Vent Valve1.1 hrs
- Fuel Cap0.3 hrs
- Fuel Filler Neck2 hrs
- Fuel Filter0.7 hrs
- Fuel Filter - In-Tank2.7 hrs
- Fuel Injector - Single1.4 hrs
- Fuel Injector Cleaning1.4 hrs
- Fuel Injectors - All3.4 hrs
- Fuel Level Sensor2.7 hrs
- Fuel Line - High Pressure2 hrs
- Fuel Line - Return1.4 hrs
- Fuel Pressure Regulator1.4 hrs
- Fuel Pump2.7 hrs
- Fuel Pump Module2.7 hrs
- Fuel Rail2 hrs
- Fuel Sending Unit2.7 hrs
- Fuel Tank4.1 hrs
- Fuel Tank Strap3.4 hrs
- High Pressure Fuel Pump4.1 hrs
hvac
- AC Accumulator2 hrs
- AC Clutch Coil2 hrs
- AC Compressor4.4 hrs
- AC Compressor Clutch2.7 hrs
- AC Compressor Oil Add0.7 hrs
- AC Condenser3.4 hrs
- AC Evaporator8.1 hrs
- AC Expansion Valve (TXV)5.4 hrs
- AC High Pressure Switch0.7 hrs
- AC Hose - High Side2 hrs
- AC Hose - Low Side2 hrs
- AC Hose Assembly2.7 hrs
- AC Low Pressure Switch0.7 hrs
- AC Orifice Tube2 hrs
- AC Pressure Sensor0.7 hrs
- AC Receiver/Drier2 hrs
- AC Recharge0.7 hrs
- AC System Evacuate and Recharge2 hrs
- Blend Door Actuator2.7 hrs
- Cabin Air Filter0.4 hrs
- Climate Control Module1.4 hrs
- HVAC Control Panel1.4 hrs
- Mode Door Actuator2.7 hrs
- Recirculation Door Actuator2 hrs
ignition
- Coil Pack1.1 hrs
- Distributor2 hrs
- Distributor Cap0.7 hrs
- Distributor Cap and Rotor0.7 hrs
- Distributor Rotor0.4 hrs
- Ignition Coil - Single0.7 hrs
- Ignition Coils - All2 hrs
- Ignition Control Module1.4 hrs
- Ignition Lock Cylinder2.7 hrs
- Ignition Switch2 hrs
- Spark Plug Wires1.1 hrs
- Spark Plugs1.9 hrs
- Spark Plugs - V63.4 hrs
- Spark Plugs - V82.7 hrs
interior
- Armrest0.7 hrs
- Carpet5.4 hrs
- Center Console2 hrs
- Dash Pad4.1 hrs
- Dashboard8.1 hrs
- Door Armrest0.7 hrs
- Door Panel1.4 hrs
- Floor Mat Hooks0.4 hrs
- Glove Box0.7 hrs
- Glove Box Latch0.4 hrs
- Headliner5.4 hrs
- Pedal Pads0.4 hrs
- Rearview Mirror0.4 hrs
- Seat - Front2 hrs
- Seat - Rear1.4 hrs
- Seat Belt1.4 hrs
- Seat Belt Buckle1.1 hrs
- Seat Belt Pretensioner2 hrs
- Seat Cover3.4 hrs
- Seat Foam2.7 hrs
- Seat Track2 hrs
- Shifter Boot0.7 hrs
- Shifter Knob0.3 hrs
- Steering Wheel Cover0.4 hrs
- Sun Visor0.4 hrs
maintenance
- 100K Service6.8 hrs
- 30K Service2.7 hrs
- 60K Service4.1 hrs
- 90K Service5.4 hrs
- AC System Diagnosis1.4 hrs
- Air Filter0.3 hrs
- Battery Test0.3 hrs
- Brake Fluid Service1.1 hrs
- Cabin Air Filter0.4 hrs
- Charging System Test0.4 hrs
- Check Engine Light Diagnosis1.4 hrs
- Compression Test1.4 hrs
- Coolant Service1.4 hrs
- Cooling System Pressure Test0.7 hrs
- Diagnostic Scan0.7 hrs
- Differential Service0.7 hrs
- Drivability Diagnosis2 hrs
- Electrical Diagnosis2 hrs
- Emissions Inspection0.7 hrs
- Fluid Leak Diagnosis0.7 hrs
- Fuel Filter0.7 hrs
- Leak-Down Test2 hrs
- Noise Diagnosis1.4 hrs
- Oil Change0.4 hrs
- Oil Change - Diesel0.7 hrs
- Oil Change - Synthetic0.4 hrs
- Power Steering Service0.7 hrs
- Pre-Purchase Inspection1.4 hrs
- Spark Plug Service1.4 hrs
- State Inspection0.7 hrs
- Tire Balance0.7 hrs
- Tire Mount and Balance1.4 hrs
- Tire Rotation0.4 hrs
- TPMS Relearn0.4 hrs
- TPMS Sensor0.7 hrs
- Transfer Case Service0.7 hrs
- Transmission Service1.4 hrs
- Tune-Up - Major4.1 hrs
- Tune-Up - Minor2 hrs
- Wheel Alignment1.4 hrs
- Wheel Alignment - 4 Wheel2 hrs
steering
- Center Link/Drag Link2 hrs
- Electric Power Steering Module2 hrs
- Electric Power Steering Motor3.4 hrs
- Idler Arm1.4 hrs
- Pitman Arm1.6 hrs
- Power Steering Fluid Flush0.7 hrs
- Power Steering Gear Box4.7 hrs
- Power Steering Hose - High Pressure1.4 hrs
- Power Steering Hose - Return1.1 hrs
- Power Steering Pump2 hrs
- Power Steering Pump Pulley1.1 hrs
- Power Steering Rack5.4 hrs
- Power Steering Reservoir0.7 hrs
- Rack and Pinion Boots2.7 hrs
- Steering Angle Sensor1.4 hrs
- Steering Column4.1 hrs
- Steering Coupler1.4 hrs
- Steering Damper0.7 hrs
- Steering Shaft - Intermediate2 hrs
- Steering Shaft - Upper2 hrs
- Steering Wheel1.4 hrs
- Tie Rod Assembly2 hrs
- Tie Rod End - Inner1.6 hrs
- Tie Rod End - Outer1.1 hrs
- Tie Rods - Both Sides2.7 hrs
suspension
- Air Line1.4 hrs
- Air Spring/Air Bag2 hrs
- Air Suspension Compressor2 hrs
- Air Suspension Height Sensor1.4 hrs
- Air Suspension Valve Block2.7 hrs
- Ball Joint - Lower2.4 hrs
- Ball Joint - Upper2 hrs
- Ball Joints - Upper and Lower4.1 hrs
- Coil Spring - Front2.7 hrs
- Coil Spring - Rear2 hrs
- Coil Springs - Front Pair3.4 hrs
- Coil Springs - Rear Pair2.7 hrs
- Control Arm Bushing - Front Lower3.4 hrs
- Control Arm Bushing - Front Upper2.7 hrs
- Control Arm Bushing - Rear2.7 hrs
- Front Strut - Single2 hrs
- Front Struts - Pair3.4 hrs
- Knuckle/Spindle - Front3.4 hrs
- Knuckle/Spindle - Rear2.7 hrs
- Lateral Arm2 hrs
- Leaf Spring2.7 hrs
- Leaf Spring Bushing2.7 hrs
- Leaf Spring Shackle1.4 hrs
- Leaf Spring U-Bolt Kit2 hrs
- Lower Control Arm2.7 hrs
- Lower Control Arm - Front2.7 hrs
- Lower Control Arm - Rear2.7 hrs
- Panhard Bar/Track Bar2 hrs
- Radius Arm2.7 hrs
- Radius Arm Bushing3.4 hrs
- Rear Shock - Single1.4 hrs
- Rear Shocks - Pair2 hrs
- Strut Assembly - Front2.7 hrs
- Strut Assembly - Rear2 hrs
- Strut Bearing3.4 hrs
- Strut Mount - Front3.4 hrs
- Strut Mount - Rear2.7 hrs
- Subframe8.1 hrs
- Subframe Bushing5.4 hrs
- Sway Bar - Front1.4 hrs
- Sway Bar - Rear1.4 hrs
- Sway Bar Bushing - Front0.7 hrs
- Sway Bar Bushing - Rear0.7 hrs
- Sway Bar Link - Front0.7 hrs
- Sway Bar Link - Rear0.7 hrs
- Sway Bar Links - Front Pair1.1 hrs
- Torsion Bar2.7 hrs
- Torsion Bar Adjustment0.7 hrs
- Trailing Arm2.7 hrs
- Trailing Arm Bushing3.4 hrs
- Upper Control Arm2 hrs
- Upper Control Arm - Front2 hrs
- Upper Control Arm - Rear2 hrs
transmission
- Clutch Cable1.4 hrs
- Clutch Disc6.8 hrs
- Clutch Hydraulic Line2 hrs
- Clutch Kit6.8 hrs
- Clutch Master Cylinder2 hrs
- Clutch Slave Cylinder2.7 hrs
- Dual Mass Flywheel7.4 hrs
- Flywheel Replacement6.8 hrs
- Flywheel Resurface6.8 hrs
- Kickdown Cable1.1 hrs
- Manual Trans Fluid Change0.7 hrs
- Neutral Safety Switch1.4 hrs
- Overdrive Solenoid2.7 hrs
- Pilot Bearing6.8 hrs
- Pressure Plate6.8 hrs
- Shift Cable2 hrs
- Shift Fork10.8 hrs
- Shift Linkage1.4 hrs
- Shift Solenoid - Single2.7 hrs
- Shift Solenoids - All4.1 hrs
- Synchros - All16.2 hrs
- Synchros - Single Gear13.5 hrs
- Throw-Out Bearing6.8 hrs
- Torque Converter8.1 hrs
- Torque Converter Clutch Solenoid2.7 hrs
- Transmission Control Module1.4 hrs
- Transmission Cooler Lines1.4 hrs
- Transmission Filter1.4 hrs
- Transmission Filter and Fluid1.6 hrs
- Transmission Fluid Change1.1 hrs
- Transmission Flush2 hrs
- Transmission Input Shaft Bearing10.8 hrs
- Transmission Mount1.4 hrs
- Transmission Oil Cooler2 hrs
- Transmission Output Shaft Bearing10.8 hrs
- Transmission Pan Gasket1.4 hrs
- Transmission R&R - Automatic8.1 hrs
- Transmission R&R - Manual6.8 hrs
- Transmission Range Sensor1.4 hrs
- Transmission Rebuild - Automatic20.2 hrs
- Transmission Rebuild - Manual16.2 hrs
- Transmission Speed Sensor - Input1.4 hrs
- Transmission Speed Sensor - Output1.4 hrs
- Valve Body4.1 hrs