Grounding Points Overview

General Information About Grounding Points
There are two main types of grounding point in the car: those having a component number and those where a component is grounded directly to the chassis, such as temperature sensors, the oil pressure sensor, etc.

The car battery is connected to ground by means of two cables. One has a cross-section area of 25 mm2 and goes straight to the gearbox (grounding point G25).

The other has a cross-section area of 16 mm2 and goes to grounding point G2, which is located behind the battery on the left-hand wheel housing.

For radio interference suppression, a braided grounding strap is connected between the engine mounting and the car body.

Grounding points having a component number are covered in this section.

Note that since the cars are available in different market versions, certain models might not have some of the grounding points listed in the following.

A component may be connected to different grounding points, depending on whether the car is LHD or RHD. This is drawn on each system wiring diagram.

Grounding Points: General Information:

List Of Grounding Points
G2 Grounding point, LH wheel housing
G3 Grounding point, luggage compartment, under left-hand rear light cluster
G4 Grounding point,centre console between the front seats
G7L Grounding point, engine (Lambda).
G7P Grounding point, engine (Power).
G7S Grounding point, engine (Signal).
G14 Grounding point, left-hand front seat member.
G24 Grounding point, right-hand front seat member.
G25 Battery ground, gearbox.
G30 Grounding point, left-hand structural member, behind the battery.
G31 Grounding point, right-hand structural member, in the engine bay on the right- hand side.
G33P Grounding point, connector bracket (Power) below the left-hand A pillar.
G33S Grounding point, connector bracket (Signal) below the left-hand A pillar.
G34P Grounding point, electronic control module bracket (Power) below the left- hand A pillar.
G34S Grounding point, control module bracket (Signal) below the right-hand A pillar.
G35 Grounding point, dashboard, behind the connector bracket on the side wall under the dashboard.
G36S Grounding point, (Signal), left-hand secondary B pillar on Cabriolet.
G37 Grounding point, for Motronic 5.2 above grounding point G34.