Check Engine Light On - Code P0450 (DTB 21/99-2; MB-NET 261)

Publication date: 1999-05-11
Reference number: DTB 21/99-2; MB-NET 261
Supersedes refnos: DTB 05/99-2; MB-NET 086

CHECK ENGINE LIGHT ON - CODE P0450

TECHNICAL SERVICE BULLETIN

Reference Number(s): DTB 21/99-2; MB-NET 261, Date of Issue: May 11, 1999

MERCEDES-BENZ:	Model CLK320 Cabriolet And CLK430 Cabriolet,
GROUP:	14 - Exhaust manifold, engine brake, emission control system

Superceded Bulletin(s): DTB 05/99-2; MB-NET 086, Date of Issue: February 9, 1999

SUBJECT

DEALER TECHNICAL BULLETIN 21/99

**REPLACES DEALER TECHNICAL BULLETIN 05/99 DATED FEB. 9, 1999**

SERVICE INFORMATION

21/99-1 RECALLS AND SERVICE CAMPAIGNS: WHEN REPAIRING ANY VEHICLE, ALWAYS CHECK THE VEHICLE MASTER INQUIRY FOR OPEN CAMPAIGNS

21/99-2 GROUP 14 - MODEL CLK320 CABRIOLET AND CLK430 Cabriolet, CHECK ENGINE LIGHT ON: If you recur complaints of code P0450 and/or the check engine light activated for models CLK320 Cabriolet (208.465) and CLK430 Cabriolet (208.470), please change the version code of the engine control module (ME-SFI) as follows. This complaint is caused by the OBD system performing fuel tank pressure sensor tests with a full fuel tank, i.e. after refueling.

VERSION CODE SPECIFICATION

Model

Eng. Control Mod. (ME-SFI) Number

Version Code From Factory

Change To Version Code

208.465

025 545 86 32

137 063 008

073 063 008

026 545 66 32 ⁽¹⁾

137 063 008

208.470

025 545 89 32

137 063 013

073 063 013

026 545 69 32 ⁽¹⁾

137 063 013

⁽¹⁾	Original version code as entered at factory used again together with modified software and new part number to correct software problem (OBD system performing fuel tank pressure sensor test with a full fuel tank).

In case of warranty, please use Damage Code 14364 01.