Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Starting, Basic Function - GF07.10-P-1032A
Engine All (CAR)
Overview
This document contains information on:
- General
- Function requirements
- Function
General
To start the combustion Engine, the powertrain control unit actuates the starter. During the starting procedure, the combustion Engine control unit coordinates the injection sequence and firing order.
The start quantity control in the combustion Engine control unit calculates the fuel quantity required to start the combustion Engine.
Function requirements
- Engine management ON (circuit 87M).
- Engine not in operation.
- Drive authorization system 4 (DAS 4) start enable.
- Drive range P or N engaged (automatic or dual-clutch transmission).
Function
Due to the start position of the ignition key, the electronic ignition lock control unit transmits its status to the body/drivetrain signal acquisition and actuation module. If the combustion Engine control unit detects Engine running and the end of the starting procedure, the driver can regulate the Engine speed via the accelerator pedal sensor.
| Function schematics | |||
| Function schematic for starting | Engine 608 in Model 118, 177, 247 | PE07.10-P-2507-97A | |
| Engine 282 in Model 118, 177, 247 | PE07.10-P-2507-97B | ||
| Engine 654 in Model 118, 167, 177, 247 Engine 654 in Model 213, 238, 257 as of model year 2021 Engine 656 in Model 167, 223 |
PE07.10-P-2507-97C | ||
| Engine 256 in Model 167 Engine 256 in Model 213, 238 as of model year 2021 Engine 264 in Model 213, 238, 257 as of model year 2021 |
PE07.10-P-2507-97D | ||
| Engine 176, 177 in Model 167 Engine 177.8 in Model 290 |
PE07.10-P-2507-97E | ||
| Engine 139 in Model 118, 177, 247 | PE07.10-P-2507-97F | ||
| Engine 254 in Model 206 Engine 256 in Model 223 |
PE07.10-P-2507-97G | ||
| Engine 176 in Model 223 | PE07.10-P-2507-97H | ||
| Engine 279 in Model 223 | PE07.10-P-2507-97I | ||
| Engine 654 in Model 206 Engine 656 in Model 223 |
PE07.10-P-2507-97K | ||
| Function schematic for starting | Engine 177.8 in Model 223, 232 | PE07.70-P-2500-97F | |
| Additional basic functions | |||
| End of start, basic function | Engine All (CAR) | GF07.10-P-1033A | |
| Combustion Engine control unit, basic function | Engine All (CAR) | GF07.08-P-9890A | |
| Powertrain control unit, basic function | Engine All (CAR) | GF54.21-P-9894A | |
| Electronic ignition lock control unit, basic function | Engine All (CAR) | GF80.57-P-9890A | |
| Accelerator pedal sensor, basic function | Engine All (CAR) | GF30.20-P-2000A |
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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