MercedesB2502018Overview/mercedes/b250/2018/base/

2018 Mercedes B250

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2018 B250.

Model year201820172015

Service quick specs OEM factory data

Capacities, torques and tune-up values from the factory service manual.

Torque the oil drain plug to 20.0 ft-lbs. The firing order is 1-3-4-2. Note the cylinder-head bolts finish on a torque angle (torque-to-yield) — they stretch permanently and should be replaced, not reused, during any head service.

Engine torques

Crankshaft Position (CKP) Sensor Bolt(s)7.4 ft-lbs
Camshaft Position (CMP) Sensor Bolt(s)7.4 ft-lbs
Oxygen (O2S) Sensor Bolt(s)30.0 ft-lbs
Knock Sense (KS) Bolt(s)16.0 ft-lbs
Intake Manifold to Engine Bolts10.3 ft-lbs
Exhaust Manifold to Cylinder Head Bolts15 ft-lbs
Oil Pan to Block Bolts7.2-8.7 ft-lbs
Engine Oil Pan Drain Plug20.0 ft-lbs

Ignition

Cylinder Firing Order1-3-4-2

Multi-step torque procedures OEM · verified

Camshaft Bearing/Carrier Cap Bolts or Studs — tightening sequence 1 stages
189.0 inch lbs., Step 2: 9089 in
Connecting Rod (Large End) Bearings — tightening sequence 1 stages
144.0 inch lbs., Step 2: 132.0 inch lbs., Step 3: 9044 in
Crankshaft Pulley and/or Damper Bolts — tightening sequence 1 stages
1148.0 ft. lbs., Step 2: 180148 ft. lbs
Cylinder Head — tightening sequence 6 stages

Prep Do not reuse old bolts. Use new bolts coated with clean engine oil. Tighten all bolts to finger tight then continue on with the following procedure.

1Bolts 1-1014.7 ft. lbs
229.5 ft. lbs.29.5 ft. lbs
390 degrees90 degrees
490 degrees90 degrees
590 degrees90 degrees
614.8
Engine Flywheel Bolts — tightening sequence 1 stages
133.0 ft. lbs., Step 2: 9033 ft. lbs
Main Bearings — tightening sequence 1 stages
127.0 ft. lbs., Step 2: 12027 ft. lbs

Common OBD-II trouble codes

The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.

P0420
Catalyst system efficiency below threshold — Bank 1
P0300
Random / multiple cylinder misfire detected
P0171
System too lean — Bank 1
P0455
Evaporative emission system leak detected — large leak
P0128
Coolant thermostat below regulating temperature
P0442
Evaporative emission system leak detected — small leak

VIN tools

Decode factory build data for a specific vehicle by VIN.

VIN
Decode a VIN to confirm the transmission and build data for a specific B250. OEM
Build data
Plant, GVWR class, engine and body data for any 17-character VIN.
Recalls
Check open recall campaigns against a specific vehicle by VIN.

Reference guides

Cross-vehicle references for the kinds of data on this page.