BMW 3 Owners & Service Manuals

BMW 3: General driving notes

Closing the trunk lid

Safety information

Warning An open trunk lid protrudes from the vehicle and can endanger occupants and other traffic participants or damage the vehicle in the event of an accident, braking or evasive maneuvers.

In addition, exhaust fumes may enter the car's interior. There is a risk of injury or risk of damage to property. Do not drive with the trunk lid open.

Driving with the trunk lid open

If driving with the tailgate open cannot be avoided:

  • Close all windows and the glass sunroof.
  • Greatly increase the air flow from the vents.
  • Drive moderately.

Hot exhaust gas system

Warning During driving operation, high temperatures can occur underneath the vehicle body, for instance caused by the exhaust gas system. If combustible materials, such as leaves or grass, come in contact with hot parts of the exhaust gas system, these materials can ignite. There is a risk of injury or risk of damage to property. Do not remove the heat shields installed and never apply undercoating to them. Make sure that no combustible materials can come in contact with hot vehicle parts in driving operation, idle or during parking. Do not touch the hot exhaust gas system.

Mobile communication devices in the vehicle

Warning Vehicle electronics and mobile phones can influence one another. There is radiation due to the transmission operations of mobile phones.

There is a risk of injury or risk of damage to property. If possible, in the car's interior use only mobile phones with direct connections to an exterior antenna in order to exclude mutual interference and deflect the radiation from the car's interior.


On wet or slushy roads, a wedge of water can form between the tires and road surface.

This phenomenon is referred to as hydroplaning.

It is characterized by a partial or complete loss of contact between the tires and the road surface, ultimately undermining your ability to steer and brake the vehicle.

Driving through water

General information

When driving through water, follow the following:

  • Drive through calm water only.
  • Drive through water only if it is not deeper than maximum 9.8 inches/25 cm.
  • Drive through water no faster than walking speed, up to 3 mph/5 km/h.

Safety information

NOTICE When driving too quickly through too deep water, water can enter into the engine compartment, the electrical system or the transmission.

There is a risk of damage to property. When driving through water, do not exceed the maximum indicated water level and the maximum speed for driving through water.

Braking safely

General information

The vehicle is equipped with the Antilock Brake System ABS as a standard feature.

Perform an emergency stop in situations that require such.

Steering is still responsive. You can still avoid any obstacles with a minimum of steering effort.

Pulsation of the brake pedal and sounds from the hydraulic circuits indicate that the Antilock Brake System ABS is in its active mode.

In certain braking situations, the perforated brake discs can emit functional noises. However, functional noises have no effect on the performance and operational reliability of the brake.

Objects in the area around the pedals

Warning Objects in the driver's floor area can limit the pedal distance or block a depressed pedal.

There is a risk of accident. Stow objects in the vehicle such that they are secured and cannot enter into the driver's floor area. Use floor mats that are suitable for the vehicle and can be safely attached to the floor. Do not use loose floor mats and do not layer several floor mats.

Make sure that there is sufficient clearance for the pedals. Ensure that the floor mats are securely fastened again after they were removed, for instance for cleaning.

Driving in wet conditions

When roads are wet, salted, or in heavy rain, gently press the brake pedal every few miles.

Ensure that this action does not endanger other traffic.

The heat generated during braking dries brake discs and brake pads and protects them against corrosion.

In this way braking efficiency will be available when you need it.


General information

Drive long or steep downhill gradients in the gear that requires least braking effort. Otherwise, the brakes may overheat and reduce brake efficiency.

You can increase the engine's braking effect by shifting down, going all the way to first gear, if needed.

Safety information

Warning Light but consistent brake pressure can lead to high temperatures, brakes wearing out and possibly even brake failure. There is a risk of accident. Avoid placing excessive stress on the brake system.

Warning In idle state or with the engine switched off, safety functions, for instance engine braking effect, braking assistance and steering assistance, may not be available. There is a risk of accident. Do not attempt to drive in idle state or with the engine switched off.

Brake disc corrosion

Corrosion on the brake discs and contamination on the brake pads are increased by the following circumstances:

  • Low mileage.
  • Extended periods when the vehicle is not used at all.
  • Infrequent use of the brakes.
  • Aggressive, acidic, or alkaline cleaning agents.

Corrosion buildup on the brake discs will cause a pulsating effect on the brakes in their response - generally this cannot be corrected.

Condensation water under the parked vehicle

When using the automatic climate control, condensation water develops and collects underneath the vehicle.

M340i with M Technology package: Ground clearance

NOTICE If the ground clearance is insufficient, e.g., curbs or underground garage entrances, contact with vehicle parts, e.g., spoiler, and the underbody may occur. There is a risk of damage to property. Ensure that there is sufficient ground clearance available.


     Roof-mounted luggage rack

    General information Roof racks are available as special accessories. Roof drip rail with flaps The fixing points are located in the roof drip rail above the doors. Fold the cover outward. Mounting F

     Saving fuel

     Reducing fuel consumption

    General information The vehicle contains advanced technologies for the reduction of consumption and emission values. Fuel consumption depends on a number of different factors. Carrying out certain m


     Head-up Display

    Concept This system projects important information into the driver's field of vision, for instance the speed. The driver can get information without averting his or her eyes from the road. General information Follow the information on cleaning the Head-up Display. Overview Switching on/off Via iDr

     Setup assistant

    The setup assistant is offered in new vehicles for a limited period of time on the Welcome screen to configure the most important settings for the vehicle. "Getting started" Select to start the set-up assistant. The set-up assistant can be started via iDrive at any time. 1. "CAR". 2. "Settings".

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