Section 4 (Engine Controls - System/Component Tests - 2.5L Diesel): Introduction

WARNING: This page is about a different car, the 1992 Mercedes-Benz 300D. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: For component locations, see Figure .

Before testing separate components or systems, perform preliminary inspection. Since many computer-controlled and monitored components set a trouble code if they malfunction, also perform procedures in the TESTS W/CODES - 2.5L DIESEL article in this section.

NOTE: Testing individual components does not isolate shorts or opens. Perform all voltage tests with a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance, unless stated otherwise in test procedure. Use ohmmeter to isolate wiring harness shorts or opens.